Version: 0.9.76.dev.260505

后端：
1.阶段 6 agent / memory 服务化收口
- 新增 cmd/agent 独立进程入口，承载 agent zrpc server、agent outbox relay / consumer 和运行时依赖初始化
- 补齐 services/agent/rpc 的 Chat stream 与 conversation meta/list/timeline、schedule-preview、context-stats、schedule-state unary RPC
- 新增 gateway/client/agent 与 shared/contracts/agent，将 /api/v1/agent chat 和非 chat 门面切到 agent zrpc
- 收缩 gateway 本地 AgentService 装配，双 RPC 开关开启时不再初始化本地 agent 编排、LLM、RAG 和 memory reader fallback
- 将 backend/memory 物理迁入 services/memory，私有实现收入 internal，保留 module/model/observe 作为 memory 服务门面
- 调整 memory outbox、memory reader 和 agent 记忆渲染链路的 import 与服务边界，cmd/memory 独占 memory worker / consumer
- 关闭 gateway 侧 agent outbox worker 所有权，agent relay / consumer 由 cmd/agent 独占，gateway 仅保留 HTTP/SSE 门面与迁移期开关回退
- 更新阶段 6 文档，记录 agent / memory 当前切流点、smoke 结果，以及 backend/client 与 gateway/shared 的目录收口口径

backend/cmd/memory/main.go

@@ -12,10 +12,10 @@ import (
 	kafkabus "github.com/LoveLosita/smartflow/backend/infra/kafka"
 	outboxinfra "github.com/LoveLosita/smartflow/backend/infra/outbox"
 	"github.com/LoveLosita/smartflow/backend/inits"
-	memorymodule "github.com/LoveLosita/smartflow/backend/memory"
-	memoryobserve "github.com/LoveLosita/smartflow/backend/memory/observe"
 	llmservice "github.com/LoveLosita/smartflow/backend/services/llm"
+	memorymodule "github.com/LoveLosita/smartflow/backend/services/memory"
 	memorydao "github.com/LoveLosita/smartflow/backend/services/memory/dao"
+	memoryobserve "github.com/LoveLosita/smartflow/backend/services/memory/observe"
 	memoryrpc "github.com/LoveLosita/smartflow/backend/services/memory/rpc"
 	memorysv "github.com/LoveLosita/smartflow/backend/services/memory/sv"
 	ragservice "github.com/LoveLosita/smartflow/backend/services/rag"