refactor: 移除心跳机制相关代码，简化服务器管理逻辑，更新文档以反映最新功能和配置

workflow_service/routes/comfy_server.py

@@ -22,12 +22,6 @@ class ServerRegistrationRequest(BaseModel):
     ws_url: str
 
 
-class ServerHeartbeatRequest(BaseModel):
-    """服务器心跳请求模型"""
-
-    name: str
-
-
 class ServerUnregisterRequest(BaseModel):
     """服务器注销请求模型"""
 
@@ -41,7 +35,6 @@ class ServerStatusResponse(BaseModel):
     http_url: str
     ws_url: str
     status: str
-    last_heartbeat: Optional[str] = None
     last_health_check: Optional[str] = None
     current_tasks: int
     max_concurrent_tasks: int
@@ -74,25 +67,6 @@ async def register_server(request: ServerRegistrationRequest):
         raise HTTPException(status_code=500, detail=f"注册失败: {str(e)}")
 
 
-@router.post("/heartbeat", response_model=Dict[str, str])
-async def update_heartbeat(request: ServerHeartbeatRequest):
-    """更新服务器心跳"""
-    try:
-        success = await server_manager.update_server_heartbeat(request.name)
-
-        if success:
-            return {
-                "message": f"服务器 {request.name} 心跳更新成功",
-                "status": "success",
-            }
-        else:
-            raise HTTPException(status_code=404, detail=f"服务器 {request.name} 不存在")
-
-    except Exception as e:
-        logger.error(f"更新服务器 {request.name} 心跳时发生错误: {e}")
-        raise HTTPException(status_code=500, detail=f"心跳更新失败: {str(e)}")
-
-
 @router.post("/unregister", response_model=Dict[str, str])
 async def unregister_server(request: ServerUnregisterRequest):
     """注销ComfyUI服务器"""
@@ -124,11 +98,6 @@ async def get_server_status(server_name: str):
             http_url=server_info.http_url,
             ws_url=server_info.ws_url,
             status=server_info.status.value,
-            last_heartbeat=(
-                server_info.last_heartbeat.isoformat()
-                if server_info.last_heartbeat
-                else None
-            ),
             last_health_check=(
                 server_info.last_health_check.isoformat()
                 if server_info.last_health_check
@@ -157,9 +126,6 @@ async def list_all_servers():
                 http_url=server.http_url,
                 ws_url=server.ws_url,
                 status=server.status.value,
-                last_heartbeat=(
-                    server.last_heartbeat.isoformat() if server.last_heartbeat else None
-                ),
                 last_health_check=(
                     server.last_health_check.isoformat()
                     if server.last_health_check