refactor: enforce single-worker control plane

app/startup/lifecycle/__init__.py

@@ -27,6 +27,7 @@ except Exception:
 from app.chain.system import SystemChain
 from app.application.plugin.runtime import get_plugin_manager
 from app.runtime.config import global_vars, settings
+from app.runtime.topology import validate_process_topology
 from app.adapters.external.server import MoviePilotServerHelper
 from app.runtime.state import SystemHelper
 from app.runtime.log import logger, LoggerManager
@@ -47,7 +48,7 @@ from app.startup.scheduler_initializer import (
     init_scheduler,
     init_plugin_scheduler,
 )
-from app.db import check_connection_budget, get_engine, get_global_async_engine
+from app.db.engine import check_connection_budget, get_engine, get_global_async_engine
 from app.startup.transfer_initializer import replay_pending_transfers
 from app.startup.workflow_initializer import init_workflow, stop_workflow
 from app.startup.lifecycle.components import (
@@ -277,6 +278,10 @@ async def lifespan(app: FastAPI):
     """
     定义应用的生命周期事件
     """
+    validate_process_topology(
+        workers=settings.API_WORKERS,
+        safe_mode=settings.MOVIEPILOT_SAFE_MODE,
+    )
     print("Starting up...")
     # 存储当前循环
     global_vars.set_loop(asyncio.get_event_loop())