增加celery任务队列，任务持久化（服务重启不丢）、支持多 Worker 水平扩展、失败自动重试

src/api/v1/upload_router.py

@@ -1,5 +1,5 @@
 # api/v1/upload_router.py
-from fastapi import APIRouter, UploadFile, File, HTTPException, BackgroundTasks, Depends, Form
+from fastapi import APIRouter, UploadFile, File, HTTPException, Depends, Form
 import uuid
 from datetime import datetime
 from pathlib import Path
@@ -12,8 +12,8 @@ from database.database import get_db_session
 from utils.logger import get_logger
 from sqlalchemy.ext.asyncio import AsyncSession
 from services.auth_service import get_current_active_user
-from services.processing_service import processing_service
 from models.database import User
+from celery_tasks import process_stp_task
 
 logger = get_logger(__name__)
 
@@ -24,7 +24,6 @@ file_handler = FileHandler()
 
 @router.post("/upload")
 async def upload_stp(
-    background_tasks: BackgroundTasks,
     file: UploadFile = File(...),
     material: str = Form(...),
     draft_angle: float = Form(...),
@@ -91,10 +90,7 @@ async def upload_stp(
     task_info["file_hash"] = file_meta["sha256"]
     await redis_task_manager.set_task(task_id, task_info)
 
-    background_tasks.add_task(
-        processing_service.process_file_with_storage,
-        task_id, file_path, stp_file.id, process_params
-    )
+    process_stp_task.delay(task_id, str(file_path), stp_file.id, process_params)
     logger.info(f"[UPLOAD] 后台处理已调度: task_id={task_id}")
 
     return {