refactor(cron): migrate cron jobs to foundation scheduler

Replace custom goroutine-based scheduling in cron jobs with centralized
foundation scheduler. Each cron job now exposes a RunOnce method called
by the scheduler instead of managing its own ticker loop.

Changes:
- Remove interval/enabled config from cron job structs
- Convert Start() methods to RunOnce() for all cron jobs
- Add scheduler setup in main.go with configurable intervals
- Update foundation dependency to v0.6.0 for scheduler support
- Update tests to validate RunOnce nil-safety

cmd/server/main.go

@@ -23,6 +23,7 @@ import (
 	"github.com/ez-api/ez-api/internal/model"
 	"github.com/ez-api/ez-api/internal/service"
 	"github.com/ez-api/foundation/logging"
+	"github.com/ez-api/foundation/scheduler"
 	"github.com/gin-gonic/gin"
 	"github.com/redis/go-redis/v9"
 	swaggerFiles "github.com/swaggo/files"
@@ -186,33 +187,29 @@ func main() {
 	logCtx, cancelLogs := context.WithCancel(context.Background())
 	defer cancelLogs()
 	logWriter.Start(logCtx)
-	quotaResetter := cron.NewQuotaResetter(db, syncService, time.Duration(cfg.Quota.ResetIntervalSeconds)*time.Second)
-	quotaCtx, cancelQuota := context.WithCancel(context.Background())
-	defer cancelQuota()
-	go quotaResetter.Start(quotaCtx)
-	logCleaner := cron.NewLogCleaner(logDB, rdb, cfg.Log.RetentionDays, int64(cfg.Log.MaxRecords), time.Hour, logPartitioner)
-	cleanerCtx, cancelCleaner := context.WithCancel(context.Background())
-	defer cancelCleaner()
-	go logCleaner.Start(cleanerCtx)
+
+	// Initialize cron jobs
+	quotaResetter := cron.NewQuotaResetter(db, syncService)
+	logCleaner := cron.NewLogCleaner(logDB, rdb, cfg.Log.RetentionDays, int64(cfg.Log.MaxRecords), logPartitioner)
 	tokenRefresher := cron.NewTokenRefresher(
 		db,
 		rdb,
 		syncService,
-		time.Duration(cfg.TokenRefresh.IntervalSeconds)*time.Second,
 		time.Duration(cfg.TokenRefresh.RefreshSkewSeconds)*time.Second,
 		cfg.TokenRefresh.BatchSize,
 		cfg.TokenRefresh.MaxRetries,
 	)
-	tokenCtx, cancelToken := context.WithCancel(context.Background())
-	defer cancelToken()
-	go tokenRefresher.Start(tokenCtx)
-
-	// Alert Detector
 	alertDetectorConfig := cron.DefaultAlertDetectorConfig()
 	alertDetector := cron.NewAlertDetector(db, logDB, rdb, service.NewStatsService(rdb), alertDetectorConfig, logger)
-	alertDetectorCtx, cancelAlertDetector := context.WithCancel(context.Background())
-	defer cancelAlertDetector()
-	go alertDetector.Start(alertDetectorCtx)
+
+	// Setup scheduler
+	sched := scheduler.New(scheduler.WithLogger(logger), scheduler.WithSkipIfRunning())
+	sched.Every("quota-reset", time.Duration(cfg.Quota.ResetIntervalSeconds)*time.Second, quotaResetter.RunOnce)
+	sched.Every("log-cleanup", time.Hour, logCleaner.RunOnce)
+	sched.Every("token-refresh", time.Duration(cfg.TokenRefresh.IntervalSeconds)*time.Second, tokenRefresher.RunOnce)
+	sched.Every("alert-detection", time.Minute, alertDetector.RunOnce)
+	sched.Start()
+	defer sched.Stop()
 
 	adminService, err := service.NewAdminService()
 	if err != nil {

go.mod

@@ -4,7 +4,7 @@ go 1.24.5
 
 require (
 	github.com/alicebob/miniredis/v2 v2.35.0
-	github.com/ez-api/foundation v0.5.0
+	github.com/ez-api/foundation v0.6.0
 	github.com/gin-gonic/gin v1.11.0
 	github.com/pelletier/go-toml/v2 v2.2.4
 	github.com/redis/go-redis/v9 v9.17.2
@@ -60,6 +60,7 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/quic-go/qpack v0.5.1 // indirect
 	github.com/quic-go/quic-go v0.54.0 // indirect
+	github.com/robfig/cron/v3 v3.0.1 // indirect
 	github.com/rs/zerolog v1.34.0 // indirect
 	github.com/sagikazarmark/locafero v0.11.0 // indirect
 	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect

go.sum

@@ -20,8 +20,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
 github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
-github.com/ez-api/foundation v0.5.0 h1:+7FYziVt9eZN/Npwn/rKj2LOkMWpngT2br8ym4LMAC4=
-github.com/ez-api/foundation v0.5.0/go.mod h1:bTh1LA42TW4CXi1SebDEUE+fhEssFUphzcGEzyAFFZI=
+github.com/ez-api/foundation v0.6.0 h1:rRC3D6KreTuRGSUppPCvEIgqu697NLSHuk+SDuc4lGk=
+github.com/ez-api/foundation v0.6.0/go.mod h1:Ds1imonA0hbjh1vY5YPwjdAG1XhkckDSe/pR5aY2mJQ=
 github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
 github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
 github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
@@ -125,6 +125,8 @@ github.com/quic-go/quic-go v0.54.0 h1:6s1YB9QotYI6Ospeiguknbp2Znb/jZYjZLRXn9kMQB
 github.com/quic-go/quic-go v0.54.0/go.mod h1:e68ZEaCdyviluZmy44P6Iey98v/Wfz6HCjQEm+l8zTY=
 github.com/redis/go-redis/v9 v9.17.2 h1:P2EGsA4qVIM3Pp+aPocCJ7DguDHhqrXNhVcEp4ViluI=
 github.com/redis/go-redis/v9 v9.17.2/go.mod h1:u410H11HMLoB+TP67dz8rL9s6QW2j76l0//kSOd3370=
+github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
+github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
 github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
 github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=

internal/cron/alert_detector.go

@@ -15,8 +15,6 @@ import (
 
 // AlertDetectorConfig holds configuration for alert detection
 type AlertDetectorConfig struct {
-	Enabled               bool
-	Interval              time.Duration
 	ErrorSpikeThreshold   float64 // Error rate threshold (0.1 = 10%)
 	ErrorSpikeWindow      time.Duration
 	QuotaWarningThreshold float64 // Quota usage threshold (0.9 = 90%)
@@ -27,8 +25,6 @@ type AlertDetectorConfig struct {
 // DefaultAlertDetectorConfig returns default configuration
 func DefaultAlertDetectorConfig() AlertDetectorConfig {
 	return AlertDetectorConfig{
-		Enabled:               true,
-		Interval:              1 * time.Minute,
 		ErrorSpikeThreshold:   0.1, // 10% error rate
 		ErrorSpikeWindow:      5 * time.Minute,
 		QuotaWarningThreshold: 0.9, // 90% quota used
@@ -65,30 +61,13 @@ func NewAlertDetector(db, logDB *gorm.DB, rdb *redis.Client, statsService *servi
 	}
 }
 
-// Start begins the alert detection loop
-func (d *AlertDetector) Start(ctx context.Context) {
-	if d == nil || !d.config.Enabled {
+// RunOnce executes a single detection cycle. Called by scheduler.
+func (d *AlertDetector) RunOnce(ctx context.Context) {
+	if d == nil || d.db == nil {
 		return
 	}
-	if ctx == nil {
-		ctx = context.Background()
-	}
-
-	ticker := time.NewTicker(d.config.Interval)
-	defer ticker.Stop()
-
-	d.logger.Info("alert detector started", "interval", d.config.Interval)
-
-	for {
-		select {
-		case <-ctx.Done():
-			d.logger.Info("alert detector stopped")
-			return
-		case <-ticker.C:
 	d.detectOnce(ctx)
 }
-	}
-}
 
 // detectOnce runs all detection rules once
 func (d *AlertDetector) detectOnce(ctx context.Context) {

internal/cron/alert_detector_test.go

@@ -301,30 +301,16 @@ func TestAlertDetectorDetectOnceNilSafe(t *testing.T) {
 	// Should not panic
 }
 
-func TestAlertDetectorStartDisabled(t *testing.T) {
-	db := setupTestDB(t)
+func TestAlertDetectorRunOnceNilSafe(t *testing.T) {
+	// Test nil detector
+	var nilDetector *AlertDetector
+	nilDetector.RunOnce(context.Background())
 
-	config := DefaultAlertDetectorConfig()
-	config.Enabled = false
+	// Test detector with nil db
+	detector := &AlertDetector{}
+	detector.RunOnce(context.Background())
 
-	detector := NewAlertDetector(db, db, nil, nil, config, nil)
-
-	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
-	defer cancel()
-
-	// Should return immediately without blocking
-	done := make(chan struct{})
-	go func() {
-		detector.Start(ctx)
-		close(done)
-	}()
-
-	select {
-	case <-done:
-		// Expected: Start returned immediately because Enabled=false
-	case <-time.After(200 * time.Millisecond):
-		t.Error("Start did not return immediately when disabled")
-	}
+	// Should not panic
 }
 
 func TestDetectMasterMinuteSpikesRPM(t *testing.T) {

internal/cron/log_cleaner.go

@@ -25,48 +25,27 @@ type LogCleaner struct {
 	rdb           *redis.Client
 	retentionDays int
 	maxRecords    int64
-	interval      time.Duration
 	partitioner   *service.LogPartitioner
 }
 
-func NewLogCleaner(db *gorm.DB, rdb *redis.Client, retentionDays int, maxRecords int64, interval time.Duration, partitioner *service.LogPartitioner) *LogCleaner {
-	if interval <= 0 {
-		interval = time.Hour
-	}
+func NewLogCleaner(db *gorm.DB, rdb *redis.Client, retentionDays int, maxRecords int64, partitioner *service.LogPartitioner) *LogCleaner {
 	return &LogCleaner{
 		db:            db,
 		rdb:           rdb,
 		retentionDays: retentionDays,
 		maxRecords:    maxRecords,
-		interval:      interval,
 		partitioner:   partitioner,
 	}
 }
 
-func (c *LogCleaner) Start(ctx context.Context) {
+// RunOnce executes a single log cleanup. Called by scheduler.
+func (c *LogCleaner) RunOnce(ctx context.Context) {
 	if c == nil || c.db == nil {
 		return
 	}
-	if ctx == nil {
-		ctx = context.Background()
-	}
-
 	if err := c.cleanOnce(ctx); err != nil {
 		slog.Default().Warn("log cleaner run failed", "err", err)
 	}
-
-	ticker := time.NewTicker(c.interval)
-	defer ticker.Stop()
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case <-ticker.C:
-			if err := c.cleanOnce(ctx); err != nil {
-				slog.Default().Warn("log cleaner run failed", "err", err)
-			}
-		}
-	}
 }
 
 func (c *LogCleaner) cleanOnce(ctx context.Context) error {

internal/cron/log_cleaner_test.go

@@ -34,7 +34,7 @@ func TestLogCleanerRetentionDeletesOld(t *testing.T) {
 		t.Fatalf("create fresh: %v", err)
 	}
 
-	cleaner := NewLogCleaner(db, nil, 1, 0, time.Minute, nil)
+	cleaner := NewLogCleaner(db, nil, 1, 0, nil)
 	if err := cleaner.cleanOnce(context.Background()); err != nil {
 		t.Fatalf("clean once: %v", err)
 	}
@@ -64,7 +64,7 @@ func TestLogCleanerMaxRecordsKeepsLatest(t *testing.T) {
 		}
 	}
 
-	cleaner := NewLogCleaner(db, nil, 0, 3, time.Minute, nil)
+	cleaner := NewLogCleaner(db, nil, 0, 3, nil)
 	if err := cleaner.cleanOnce(context.Background()); err != nil {
 		t.Fatalf("clean once: %v", err)
 	}
@@ -85,3 +85,15 @@ func TestLogCleanerMaxRecordsKeepsLatest(t *testing.T) {
 		t.Fatalf("expected min id >= 3, got %d", min.ID)
 	}
 }
+
+func TestLogCleanerRunOnceNilSafe(t *testing.T) {
+	// Test nil cleaner
+	var nilCleaner *LogCleaner
+	nilCleaner.RunOnce(context.Background())
+
+	// Test cleaner with nil db
+	cleaner := &LogCleaner{}
+	cleaner.RunOnce(context.Background())
+
+	// Should not panic
+}

internal/cron/quota_reset.go

@@ -14,37 +14,21 @@ import (
 type QuotaResetter struct {
 	db   *gorm.DB
 	sync *service.SyncService
-	interval time.Duration
 }
 
-func NewQuotaResetter(db *gorm.DB, sync *service.SyncService, interval time.Duration) *QuotaResetter {
-	if interval <= 0 {
-		interval = 5 * time.Minute
-	}
-	return &QuotaResetter{db: db, sync: sync, interval: interval}
+func NewQuotaResetter(db *gorm.DB, sync *service.SyncService) *QuotaResetter {
+	return &QuotaResetter{db: db, sync: sync}
 }
 
-func (q *QuotaResetter) Start(ctx context.Context) {
+// RunOnce executes a single quota reset check. Called by scheduler.
+func (q *QuotaResetter) RunOnce(ctx context.Context) {
 	if q == nil || q.db == nil {
 		return
 	}
-	if ctx == nil {
-		ctx = context.Background()
-	}
-	ticker := time.NewTicker(q.interval)
-	defer ticker.Stop()
-
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case <-ticker.C:
 	if err := q.resetOnce(ctx); err != nil {
 		slog.Default().Warn("quota reset failed", "err", err)
 	}
 }
-	}
-}
 
 func (q *QuotaResetter) resetOnce(ctx context.Context) error {
 	if q == nil || q.db == nil {

internal/cron/token_refresh.go

@@ -32,17 +32,13 @@ type TokenRefresher struct {
 	db          *gorm.DB
 	rdb         *redis.Client
 	sync        *service.SyncService
-	interval    time.Duration
 	refreshSkew time.Duration
 	batchSize   int
 	maxRetries  int
 	httpClient  *http.Client
 }
 
-func NewTokenRefresher(db *gorm.DB, rdb *redis.Client, sync *service.SyncService, interval, refreshSkew time.Duration, batchSize, maxRetries int) *TokenRefresher {
-	if interval <= 0 {
-		interval = 30 * time.Minute
-	}
+func NewTokenRefresher(db *gorm.DB, rdb *redis.Client, sync *service.SyncService, refreshSkew time.Duration, batchSize, maxRetries int) *TokenRefresher {
 	if refreshSkew <= 0 {
 		refreshSkew = 50 * time.Minute
 	}
@@ -56,7 +52,6 @@ func NewTokenRefresher(db *gorm.DB, rdb *redis.Client, sync *service.SyncService
 		db:          db,
 		rdb:         rdb,
 		sync:        sync,
-		interval:    interval,
 		refreshSkew: refreshSkew,
 		batchSize:   batchSize,
 		maxRetries:  maxRetries,
@@ -64,27 +59,15 @@ func NewTokenRefresher(db *gorm.DB, rdb *redis.Client, sync *service.SyncService
 	}
 }
 
-func (t *TokenRefresher) Start(ctx context.Context) {
+// RunOnce executes a single token refresh cycle. Called by scheduler.
+func (t *TokenRefresher) RunOnce(ctx context.Context) {
 	if t == nil || t.db == nil {
 		return
 	}
-	if ctx == nil {
-		ctx = context.Background()
-	}
-	ticker := time.NewTicker(t.interval)
-	defer ticker.Stop()
-
-	for {
-		select {
-		case <-ctx.Done():
-			return
-		case <-ticker.C:
 	if err := t.refreshOnce(ctx); err != nil {
 		slog.Default().Warn("token refresh failed", "err", err)
 	}
 }
-	}
-}
 
 func (t *TokenRefresher) refreshOnce(ctx context.Context) error {
 	if t == nil || t.db == nil {