fix(realestate-lab): 코드 리뷰 이슈 수정 — 신규 추적, 보안, 비동기, 매칭 상태 보존

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

realestate-lab/app/main.py

@@ -1,7 +1,7 @@
 import os
 import logging
 from contextlib import asynccontextmanager
-from fastapi import FastAPI, Query, HTTPException
+from fastapi import BackgroundTasks, FastAPI, Query, HTTPException
 from fastapi.middleware.cors import CORSMiddleware
 from apscheduler.schedulers.background import BackgroundScheduler
 
@@ -110,11 +110,15 @@ def api_announcement_delete(ann_id: int):
 
 # ── 수집 API ─────────────────────────────────────────────────────────────────
 
-@app.post("/api/realestate/collect")
-def api_collect():
-    result = collect_all()
+def _run_collect_and_match():
+    collect_all()
     run_matching()
-    return result
+
+
+@app.post("/api/realestate/collect")
+def api_collect(background_tasks: BackgroundTasks):
+    background_tasks.add_task(_run_collect_and_match)
+    return {"ok": True, "message": "수집 시작됨"}
 
 
 @app.get("/api/realestate/collect/status")