feat(provider): add status and banning mechanism

Introduce fields for managing provider status (active, auto_disabled,
manual_disabled) and banning logic.

- Add Status, AutoBan, BanReason, and BanUntil to Provider model and DTO
- Update CreateProvider handler to process new fields with defaults
- Extend sync service to propagate status and ban information in snapshots
- Serialize BanUntil as Unix timestamp for sync compatibility

internal/api/handler.go

@@ -48,6 +48,15 @@ func (h *Handler) CreateProvider(c *gin.Context) {
 		group = "default"
 	}
 
+	status := strings.TrimSpace(req.Status)
+	if status == "" {
+		status = "active"
+	}
+	autoBan := true
+	if req.AutoBan != nil {
+		autoBan = *req.AutoBan
+	}
+
 	provider := model.Provider{
 		Name:      req.Name,
 		Type:      req.Type,
@@ -55,6 +64,13 @@ func (h *Handler) CreateProvider(c *gin.Context) {
 		APIKey:    req.APIKey,
 		Group:     group,
 		Models:    strings.Join(req.Models, ","),
+		Status:    status,
+		AutoBan:   autoBan,
+		BanReason: req.BanReason,
+	}
+	if !req.BanUntil.IsZero() {
+		tu := req.BanUntil.UTC()
+		provider.BanUntil = &tu
 	}
 
 	if err := h.db.Create(&provider).Error; err != nil {

internal/dto/provider.go

@@ -1,5 +1,7 @@
 package dto
 
+import "time"
+
 // ProviderDTO defines inbound payload for provider creation/update.
 type ProviderDTO struct {
 	Name      string    `json:"name"`
@@ -8,4 +10,8 @@ type ProviderDTO struct {
 	APIKey    string    `json:"api_key"`
 	Group     string    `json:"group"`
 	Models    []string  `json:"models"` // List of supported model names
+	Status    string    `json:"status"`
+	AutoBan   *bool     `json:"auto_ban,omitempty"`
+	BanReason string    `json:"ban_reason,omitempty"`
+	BanUntil  time.Time `json:"ban_until,omitempty"`
 }

internal/model/models.go

@@ -1,6 +1,8 @@
 package model
 
 import (
+	"time"
+
 	"gorm.io/gorm"
 )
 
@@ -40,6 +42,10 @@ type Provider struct {
 	APIKey    string     `json:"api_key"`
 	Group     string     `gorm:"default:'default'" json:"group"`         // routing group/tier
 	Models    string     `json:"models"`                                 // comma-separated list of supported models (e.g. "gpt-4,gpt-3.5-turbo")
+	Status    string     `gorm:"size:50;default:'active'" json:"status"` // active, auto_disabled, manual_disabled
+	AutoBan   bool       `gorm:"default:true" json:"auto_ban"`           // whether DP-triggered disable is allowed
+	BanReason string     `gorm:"size:255" json:"ban_reason"`             // reason for current disable
+	BanUntil  *time.Time `json:"ban_until"`                              // optional TTL for disable
 }
 
 // Model remains the same.

internal/service/sync.go

@@ -72,6 +72,12 @@ func (s *SyncService) SyncProvider(provider *model.Provider) error {
 		APIKey:    provider.APIKey,
 		Group:     group,
 		Models:    models,
+		Status:    normalizeStatus(provider.Status),
+		AutoBan:   provider.AutoBan,
+		BanReason: provider.BanReason,
+	}
+	if provider.BanUntil != nil {
+		snap.BanUntil = provider.BanUntil.UTC().Unix()
 	}
 
 	// 1. Update Provider Config
@@ -118,6 +124,10 @@ type providerSnapshot struct {
 	APIKey    string   `json:"api_key"`
 	Group     string   `json:"group"`
 	Models    []string `json:"models"`
+	Status    string   `json:"status"`
+	AutoBan   bool     `json:"auto_ban"`
+	BanReason string   `json:"ban_reason,omitempty"`
+	BanUntil  int64    `json:"ban_until,omitempty"` // unix seconds
 }
 
 // keySnapshot is no longer needed as we write directly to auth:token:*
@@ -188,6 +198,12 @@ func (s *SyncService) SyncAll(db *gorm.DB) error {
 			APIKey:    p.APIKey,
 			Group:     group,
 			Models:    models,
+			Status:    normalizeStatus(p.Status),
+			AutoBan:   p.AutoBan,
+			BanReason: p.BanReason,
+		}
+		if p.BanUntil != nil {
+			snap.BanUntil = p.BanUntil.UTC().Unix()
 		}
 		payload, err := sonic.Marshal(snap)
 		if err != nil {
@@ -273,3 +289,16 @@ func normalizeGroup(group string) string {
 	}
 	return group
 }
+
+func normalizeStatus(status string) string {
+	st := strings.ToLower(strings.TrimSpace(status))
+	if st == "" {
+		return "active"
+	}
+	switch st {
+	case "active", "auto_disabled", "manual_disabled":
+		return st
+	default:
+		return st
+	}
+}