feat：LLM 分析文件并生成结构化建议

app/main.py

@@ -23,6 +23,7 @@ async def lifespan(application: FastAPI):
     from app.clients.decision import close_decision_engine
     from app.clients.mcp import start_mcp_servers, stop_mcp_servers
     from app.clients.user_center import close_user_center
+    from app.datafiles.insights import generate_insights, insights_enabled
     from app.datafiles.service import DataFileService
     from app.datafiles.storage import open_data_file_store
     from app.observability.tracing import flush_tracing
@@ -36,10 +37,13 @@ async def lifespan(application: FastAPI):
     application.state.conversation_store = persistence.store
     mcp_processes = []
     sweeper = None
+    data_files = None
     try:
         # 数据文件的元数据和会话记录用同一种存储；启动时先清理一遍过期目录，之后每小时一次
         data_files = DataFileService(
-            await open_data_file_store(persistence.db), persistence.store
+            await open_data_file_store(persistence.db),
+            persistence.store,
+            insights=generate_insights if insights_enabled() else None,
         )
         application.state.data_file_service = data_files
         sweeper = asyncio.create_task(data_files.run_sweeper())
@@ -59,6 +63,8 @@ async def lifespan(application: FastAPI):
     finally:
         if sweeper is not None:
             sweeper.cancel()
+        if data_files is not None:
+            await data_files.aclose()
         # 共享客户端只在应用退出时关闭，追踪刷新放到线程避免阻塞事件循环
         try:
             await stop_mcp_servers(mcp_processes)