feat(api): add public status endpoints with version injection

Replace health_handler with status_handler providing public /status and
/about endpoints. Add build-time version injection via ldflags in
Makefile, and support --version/-v CLI flag.

- Add /status endpoint returning runtime status, uptime, and version
- Add /about endpoint with system metadata (name, description, repo)
- Configure VERSION variable with git describe fallback
- Update swagger docs and api.md for new public endpoints
- Remove deprecated /api/status/test endpoint

cmd/server/main.go

@@ -77,6 +77,12 @@ func isOriginAllowed(allowed []string, origin string) bool {
 }
 
 func main() {
+	// Handle --version flag before any initialization
+	if len(os.Args) > 1 && (os.Args[1] == "--version" || os.Args[1] == "-v") {
+		fmt.Printf("ez-api %s\n", api.Version)
+		os.Exit(0)
+	}
+
 	logger, _ := logging.New(logging.Options{Service: "ez-api"})
 	if len(os.Args) > 1 && os.Args[1] == "import" {
 		code := runImport(logger, os.Args[2:])
@@ -196,7 +202,7 @@ func main() {
 	masterService := service.NewMasterService(db)
 	statsService := service.NewStatsService(rdb)
 	healthService := service.NewHealthCheckService(db, rdb)
-	healthHandler := api.NewHealthHandler(healthService)
+	statusHandler := api.NewStatusHandler(healthService)
 
 	handler := api.NewHandler(db, logDB, syncService, logWriter, rdb, logPartitioner)
 	adminHandler := api.NewAdminHandler(db, logDB, masterService, syncService, statsService, logPartitioner)
@@ -265,7 +271,10 @@ func main() {
 		}
 		c.JSON(httpStatus, status)
 	})
-	r.GET("/api/status/test", healthHandler.TestDeps)
+
+	// Public Status Endpoints
+	r.GET("/status", statusHandler.Status)
+	r.GET("/about", statusHandler.About)
 
 	// Swagger Documentation
 	r.GET("/swagger/*any", ginSwagger.WrapHandler(swaggerFiles.Handler))