Fix: [2.0.11] 라이브 DownloadError 스킵 처리 및 채널명 표시

- yt-dlp DownloadError에서 라이브/프리미어 감지 시 SkipVideo로 변환 (500 방지)
- channel_name 필드 추가로 Discord 알림에 채널명(머니코믹스/슈카월드) 표시

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/main.py

@@ -12,6 +12,7 @@ app = FastAPI(title="News Summary Bot")
 class SummarizeRequest(BaseModel):
     video_url: str
     title: str = ""
+    channel_name: str = ""
 
 
 @app.post("/summarize")
@@ -23,16 +24,17 @@ async def summarize_video(
         raise HTTPException(status_code=401, detail="Unauthorized")
 
     title = req.title or "제목 없음"
+    channel_name = req.channel_name or ""
 
     try:
         video_id = extract_video_id(req.video_url)
         transcript = fetch_transcript(video_id)
         summary = summarize(transcript, title)
-        await send_to_discord(title, req.video_url, summary)
+        await send_to_discord(title, req.video_url, summary, channel_name)
     except SkipVideo as e:
         return {"status": "skipped", "title": title, "reason": str(e)}
     except Exception as e:
-        await send_error_to_discord(title, req.video_url, e)
+        await send_error_to_discord(title, req.video_url, e, channel_name)
         raise HTTPException(status_code=500, detail=str(e))
 
     return {"status": "ok", "title": title, "summary_length": len(summary)}