调整入口代码结构

backend/main.py

@@ -1,4 +1,5 @@
 from dotenv import load_dotenv
+from llama_index.core.node_parser import SentenceSplitter
 
 load_dotenv()
 
@@ -13,14 +14,18 @@ from app.api.routers.upload import file_upload_router
 from app.settings import init_settings
 from app.observability import init_observability
 from fastapi.staticfiles import StaticFiles
-
+from phoenix.trace import using_project
 
 logger = logging.getLogger("uvicorn")
-app = None
 
-def init_webserver():
-    global app
+usPrj = using_project(os.getenv("PHOENIX_PROJECT_NAME"))
+usPrj.__enter__()
+
+init_settings()
+init_observability()
+
 app = FastAPI()
+
 environment = os.getenv("ENVIRONMENT", "dev")  # Default to 'development' if not set
 if environment == "dev":
     logger.warning("Running in development mode - allowing CORS for all origins")
@@ -52,16 +57,12 @@ def init_webserver():
 async def redirect_to_docs():
     return RedirectResponse(url="/docs")
 
+SentenceSplitter
 if __name__ == "__main__":
-    from phoenix.trace import using_project
-    with using_project(os.getenv("PHOENIX_PROJECT_NAME")) as obj:
-
-        init_settings()
-        init_observability()
-        init_webserver()
-
     app_host = os.getenv("APP_HOST", "0.0.0.0")
     app_port = int(os.getenv("APP_PORT", "8000"))
-        #reload = True if environment == "dev" else False
+    reload = True if environment == "dev" else False
     reload = False
-        uvicorn.run(app=app, host=app_host, port=app_port, reload=reload)
+    uvicorn.run(app="main:app", host=app_host, port=app_port, reload=reload)
+
+    #usPrj.__exit__()