feat(api-gateway): 添加 core-edu 服务代理路由

main.go 新增 exams/homework/grades 三组路由(无尾斜杠+通配符)
config.go 新增 CoreEduServiceURL 字段默认 localhost:3004
删除死代码 internal/routing/routing.go(从未被 main 引用)

验证: GET /exams/class/:id 200, POST /exams 201, 链路全通

services/api-gateway/internal/config/config.go

@@ -13,6 +13,7 @@ type Config struct {
 	ClassesServiceURL string
 	IamServiceURL     string
 	TeacherBffURL     string
+	CoreEduServiceURL string
 	OTLPEndpoint      string
 	LogLevel          string
 	DevMode           bool
@@ -27,6 +28,7 @@ func Load() *Config {
 		ClassesServiceURL: getEnv("CLASSES_SERVICE_URL", "http://localhost:3001"),
 		IamServiceURL:     getEnv("IAM_SERVICE_URL", "http://localhost:3002"),
 		TeacherBffURL:     getEnv("TEACHER_BFF_URL", "http://localhost:3003"),
+		CoreEduServiceURL: getEnv("CORE_EDU_SERVICE_URL", "http://localhost:3004"),
 		OTLPEndpoint:      getEnv("OTEL_EXPORTER_OTLP_ENDPOINT", "http://localhost:4318"),
 		LogLevel:          getEnv("LOG_LEVEL", "info"),
 		DevMode:           getEnvBool("DEV_MODE", false),

services/api-gateway/internal/routing/routing.go

@@ -1,56 +0,0 @@
-package routing
-
-import (
-	"github.com/edu-cloud/api-gateway/internal/config"
-	"github.com/edu-cloud/api-gateway/internal/middleware"
-	"github.com/edu-cloud/api-gateway/internal/proxy"
-	"github.com/gin-gonic/gin"
-)
-
-// Setup 配置路由
-func Setup(cfg *config.Config) *gin.Engine {
-	gin.SetMode(gin.ReleaseMode)
-	r := gin.New()
-
-	// 中间件
-	r.Use(middleware.RequestIDMiddleware())
-	r.Use(gin.Recovery())
-
-	// 健康检查（无需鉴权）
-	r.GET("/healthz", healthz)
-
-	// API v1 组（需要鉴权）
-	api := r.Group("/api/v1")
-	api.Use(middleware.AuthMiddleware(cfg))
-	{
-		// classes 服务路由
-		classesProxy, err := proxy.NewProxy(cfg.ClassesServiceURL)
-		if err != nil {
-			panic("failed to create classes proxy: " + err.Error())
-		}
-		api.Any("/classes/*path", proxy.ProxyHandler(classesProxy))
-
-		// IAM 服务路由（身份与访问管理）
-		iamProxy, err := proxy.NewProxy(cfg.IamServiceURL)
-		if err != nil {
-			panic("failed to create iam proxy: " + err.Error())
-		}
-		api.Any("/iam/*path", proxy.ProxyHandler(iamProxy))
-
-		// Teacher BFF 路由（教师聚合层）
-		bffProxy, err := proxy.NewProxy(cfg.TeacherBffURL)
-		if err != nil {
-			panic("failed to create teacher-bff proxy: " + err.Error())
-		}
-		api.Any("/teacher/*path", proxy.ProxyHandler(bffProxy))
-	}
-
-	return r
-}
-
-func healthz(c *gin.Context) {
-	c.JSON(200, gin.H{
-		"status":  "ok",
-		"service": "api-gateway",
-	})
-}

services/api-gateway/main.go

@@ -79,6 +79,20 @@ func main() {
 		bffHandler := proxy.ProxyHandler(bffProxy)
 		api.Any("/teacher", bffHandler)
 		api.Any("/teacher/*path", bffHandler)
+
+		// core-edu 服务路由（考试/作业/成绩）
+		// 注：同时注册无尾斜杠与通配符两条路由，与 classes/iam/teacher 一致。
+		coreEduProxy, err := proxy.NewProxy(cfg.CoreEduServiceURL)
+		if err != nil {
+			log.Fatalf("failed to create core-edu proxy: %v", err)
+		}
+		coreEduHandler := proxy.ProxyHandler(coreEduProxy)
+		api.Any("/exams", coreEduHandler)
+		api.Any("/exams/*path", coreEduHandler)
+		api.Any("/homework", coreEduHandler)
+		api.Any("/homework/*path", coreEduHandler)
+		api.Any("/grades", coreEduHandler)
+		api.Any("/grades/*path", coreEduHandler)
 	}
 
 	srv := &http.Server{