feat: 完善后端脚手架基础能力

routes/routes.go

@@ -7,6 +7,8 @@ import (
 	"skeleton/routes/ws"
 
 	"github.com/gin-gonic/gin"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin"
 	"go.uber.org/zap"
 )
 
@@ -24,11 +26,22 @@ func SetupRoutes(cfg *config.Config) *gin.Engine {
 	r.MaxMultipartMemory = 100 << 20 // 100 MB
 
 	// 添加自定义中间件
+	r.Use(middlewares.RequestID())
+	if cfg.Observability.TracingEnabled {
+		r.Use(otelgin.Middleware(cfg.Observability.TracingService))
+	}
+	if cfg.Observability.MetricsEnabled {
+		r.Use(middlewares.Metrics())
+	}
 	r.Use(middlewares.CORS())         // CORS跨域处理（需要在其他中间件之前）
 	r.Use(middlewares.GinLogger())    // 结构化日志
 	r.Use(middlewares.GinRecovery())  // 异常恢复
 	r.Use(middlewares.ErrorLogging()) // 错误响应日志（用于记录逻辑异常）
 
+	if cfg.Observability.MetricsEnabled {
+		r.GET(cfg.Observability.MetricsPath, gin.WrapH(promhttp.Handler()))
+	}
+
 	// API 路由组
 	api := r.Group("/api")