import json, time, hmac, hashlib, base64, os, asyncio, uuid
from datetime import datetime
from typing import List, Optional, Union
import logging
import httpx
from fastapi import FastAPI, HTTPException, Request
from fastapi.responses import StreamingResponse
from pydantic import BaseModel

# ---------- 日志配置 ----------
logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s | %(levelna...