任务：更新代码结构，以提高可读性和可维护性

main.py

@@ -53,12 +53,22 @@ async def endpoint(body : Predictbody):
     for key ,value in data.items():
         temp[key] = value.get("value") or ""
     res[uuid.uuid4().hex] = temp
+
+    result = None
+
+    try:
+        result = engine.inference(res)
+    except Exception as e:
+        result = None
+
     return {
         "feature" : data,
-        "predict" : engine.inference(res)
+        "predict" : result
     } 
 
-        
+@app.post("/feature")     
+async def get_feature(body : Predictbody):
+    return await process_single(body.content[:10000])
 
 if __name__ == "__main__":
     import asyncio