Server: Add direct_passthrough for faster file serving

- FileResponse with direct_passthrough=True bypasses buffering
- Should improve file download speeds

server/main.py

@@ -754,7 +754,7 @@ async def get_pack_file(pack_name: str, file_path: str, request: Request):
                 size=full_path.stat().st_size,
                 client_ip=client_ip)
     
-    return FileResponse(full_path)
+    return FileResponse(full_path, direct_passthrough=True)
 
 
 # ====================== ЭНДПОИНТЫ ДЛЯ ЛАУНЧЕРА ======================