docs(README): 更新项目说明文档，完善架构与启动指南

- 调整 CLAUDE.md 内容，增加使用指导和架构概览
- 补充微服务启动说明及单服务启动命令
- 明确 Gateway 服务器四阶段启动流程和职责划分
- 细化后端目录结构说明，补充主要文件职责描述
- 新增系统分层结构图，优化整体架构理解
- 更新 .gitignore，添加 runs 目录忽略规则
- 同步 .omc 相关状态文件，更新项目状态跟踪信息

backend/runtime/manager.py

@@ -13,15 +13,30 @@ from .registry import RuntimeRegistry
 _global_runtime_manager: Optional["TradingRuntimeManager"] = None
 _shutdown_event: Optional[asyncio.Event] = None
 
+# Lazy import to avoid circular dependency
+_api_runtime = None
+
+
+def _get_api_runtime():
+    global _api_runtime
+    if _api_runtime is None:
+        from backend.api import runtime as api_runtime_module
+        _api_runtime = api_runtime_module
+    return _api_runtime
+
 
 def set_global_runtime_manager(manager: "TradingRuntimeManager") -> None:
     global _global_runtime_manager
     _global_runtime_manager = manager
+    # Sync to RuntimeState for consistency
+    _get_api_runtime().register_runtime_manager(manager)
 
 
 def clear_global_runtime_manager() -> None:
     global _global_runtime_manager
     _global_runtime_manager = None
+    # Sync to RuntimeState for consistency
+    _get_api_runtime().unregister_runtime_manager()
 
 
 def get_global_runtime_manager() -> Optional["TradingRuntimeManager"]: