refactor: 更新API路由参数解析，使用Body获取请求数据，简化请求处理逻辑

workflow_service/routes/workflow.py

@@ -1,7 +1,7 @@
 import json
 from typing import Optional, List
 
-from fastapi import APIRouter, Request, HTTPException, Path
+from fastapi import APIRouter, Body, HTTPException, Path
 from fastapi.responses import JSONResponse
 
 from workflow_service import comfyui_client
@@ -15,12 +15,11 @@ workflow_router = APIRouter(
 
 
 @workflow_router.post("", status_code=201)
-async def publish_workflow_endpoint(request: Request):
+async def publish_workflow_endpoint(data: dict = Body(...)):
     """
     发布工作流
     """
     try:
-        data = await request.json()
         name, wf_json = data.get("name"), data.get("workflow")
         if not name or not wf_json:
             raise HTTPException(