Log TTS errors on create

Record exception details during TTS generation to help diagnose 500 errors.

server/main.py

@@ -1,6 +1,8 @@
 from pathlib import Path
 from typing import List
 
+import logging
+
 from dotenv import load_dotenv
 from fastapi import FastAPI, HTTPException, Request
 from fastapi.middleware.cors import CORSMiddleware
@@ -29,6 +31,7 @@ RESOURCES_DIR = ROOT_DIR / "resources"
 load_dotenv(dotenv_path=ROOT_DIR / ".env")
 
 app = FastAPI()
+logger = logging.getLogger("tts")
 
 app.add_middleware(
     CORSMiddleware,
@@ -103,6 +106,7 @@ def api_create_tts(payload: TtsCreateRequest):
     try:
         text_to_mp3(text=text, mp3_path=str(mp3_path))
     except Exception as exc:
+        logger.exception("TTS 생성 실패")
         delete_item_by_id(tts_id)
         raise HTTPException(status_code=500, detail=str(exc)) from exc