Version: 0.9.77.dev.260505

后端：
1.阶段 6 CP4/CP5 目录收口与共享边界纯化
- 将 backend 根目录收口为 services、client、gateway、cmd、shared 五个一级目录
- 收拢 bootstrap、inits、infra/kafka、infra/outbox、conv、respond、pkg、middleware，移除根目录旧实现与空目录
- 将 utils 下沉到 services/userauth/internal/auth，将 logic 下沉到 services/schedule/core/planning
- 将迁移期 runtime 桥接实现统一收拢到 services/runtime/{conv,dao,eventsvc,model}，删除 shared/legacy 与未再被 import 的旧 service 实现
- 将 gateway/shared/respond 收口为 HTTP/Gin 错误写回适配，shared/respond 仅保留共享错误语义与状态映射
- 将 HTTP IdempotencyMiddleware 与 RateLimitMiddleware 收口到 gateway/middleware
- 将 GormCachePlugin 下沉到 shared/infra/gormcache，将共享 RateLimiter 下沉到 shared/infra/ratelimit，将 agent token budget 下沉到 services/agent/shared
- 删除 InitEino 兼容壳，收缩 cmd/internal/coreinit 仅保留旧组合壳残留域初始化语义
- 更新微服务迁移计划与桌面 checklist，补齐 CP4/CP5 当前切流点、目录终态与验证结果
- 完成 go test ./...、git diff --check 与最终真实 smoke；health、register/login、task/create+get、schedule/today、task-class/list、memory/items、agent chat/meta/timeline/context-stats 全部 200，SSE 合并结果为 CP5_OK 且 [DONE] 只有 1 个

backend/cmd/task-class/main.go

@@ -7,12 +7,12 @@ import (
 	"os/signal"
 	"syscall"
 
-	"github.com/LoveLosita/smartflow/backend/bootstrap"
-	rootdao "github.com/LoveLosita/smartflow/backend/dao"
-	rootmiddleware "github.com/LoveLosita/smartflow/backend/middleware"
+	rootdao "github.com/LoveLosita/smartflow/backend/services/runtime/dao"
 	taskclassdao "github.com/LoveLosita/smartflow/backend/services/task_class/dao"
 	taskclassrpc "github.com/LoveLosita/smartflow/backend/services/task_class/rpc"
 	taskclasssv "github.com/LoveLosita/smartflow/backend/services/task_class/sv"
+	"github.com/LoveLosita/smartflow/backend/shared/infra/bootstrap"
+	gormcache "github.com/LoveLosita/smartflow/backend/shared/infra/gormcache"
 	"github.com/spf13/viper"
 )
 
@@ -35,7 +35,7 @@ func main() {
 	defer redisClient.Close()
 
 	cacheRepo := rootdao.NewCacheDAO(redisClient)
-	if err := db.Use(rootmiddleware.NewGormCachePlugin(cacheRepo)); err != nil {
+	if err := db.Use(gormcache.NewGormCachePlugin(cacheRepo)); err != nil {
 		log.Fatalf("failed to initialize task-class cache deleter: %v", err)
 	}