feat：完成大部分数据文件上传解析功能

app/main.py

@@ -8,6 +8,8 @@ from loguru import logger
 
 from app.api.agent import router
 from app.api.conversations import router as conversation_router
+from app.api.files import limits_router as file_limits_router
+from app.api.files import router as file_router
 from app.api.materials import router as material_router
 from app.core.auth import get_current_user
 from app.core.exceptions import register_exception_handlers
@@ -21,6 +23,8 @@ 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.service import DataFileService
+    from app.datafiles.storage import open_data_file_store
     from app.observability.tracing import flush_tracing
     from app.processor.graph import build_graph
     from app.services.agent import AgentService
@@ -31,7 +35,14 @@ async def lifespan(application: FastAPI):
     persistence = await open_persistence()
     application.state.conversation_store = persistence.store
     mcp_processes = []
+    sweeper = 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
+        )
+        application.state.data_file_service = data_files
+        sweeper = asyncio.create_task(data_files.run_sweeper())
         # 物料目录启动时载入内存，动作校验与前端接口共用，避免重复查询数据库
         await warm_material_cache(persistence.db)
         # 拉起 mcp_servers.json 中由应用管理的服务；单个服务失败只记录，用到它的请求执行时报错
@@ -42,10 +53,12 @@ async def lifespan(application: FastAPI):
         except Exception as error:
             logger.opt(exception=error).error("screen agent 预先组装失败")
         application.state.agent_service = AgentService(
-            build_graph(persistence.checkpointer), persistence.store
+            build_graph(persistence.checkpointer), persistence.store, data_files
         )
         yield
     finally:
+        if sweeper is not None:
+            sweeper.cancel()
         # 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)
@@ -76,6 +89,9 @@ def create_app() -> FastAPI:
     application.include_router(
         conversation_router, prefix="/api", dependencies=authenticated
     )
+    # 上传限制无需登录；要先于 /files/{file_id} 注册，否则会被当成文件 ID
+    application.include_router(file_limits_router, prefix="/api")
+    application.include_router(file_router, prefix="/api", dependencies=authenticated)
     application.include_router(material_router, prefix="/api")
     return application