fix(travel-proxy): indexer.py stat() 에러 핸들링 + updated 카운터 + 로깅 개선

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

travel-proxy/app/indexer.py

@@ -23,9 +23,14 @@ def _scan_folder(folder: Path) -> List[Dict[str, Any]]:
     with os.scandir(folder) as entries:
         for entry in entries:
             if entry.is_file() and Path(entry.name).suffix.lower() in IMAGE_EXT:
+                try:
+                    mtime = entry.stat().st_mtime
+                except OSError as e:
+                    logger.warning("Cannot stat %s: %s", entry.path, e)
+                    continue
                 items.append({
                     "filename": entry.name,
-                    "mtime": entry.stat().st_mtime,
+                    "mtime": mtime,
                 })
     return items
 
@@ -73,8 +78,12 @@ def sync(
     start = time.time()
 
     # 1. region_map.json에서 전체 앨범 폴더 수집
-    with open(region_map_path, "r", encoding="utf-8") as f:
-        region_map = json.load(f)
+    try:
+        with open(region_map_path, "r", encoding="utf-8") as f:
+            region_map = json.load(f)
+    except (FileNotFoundError, json.JSONDecodeError) as e:
+        logger.error("Failed to load region_map: %s", e)
+        raise
 
     all_albums: Set[str] = set()
     for v in region_map.values():
@@ -85,6 +94,7 @@ def sync(
 
     # 2. 각 앨범 폴더 스캔 → DB 동기화
     added = 0
+    updated = 0
     removed = 0
 
     for album in sorted(all_albums):
@@ -97,6 +107,8 @@ def sync(
             result = db.upsert_photo(album, item["filename"], item["mtime"])
             if result == "added":
                 added += 1
+            elif result == "updated":
+                updated += 1
 
         removed += db.remove_missing_photos(album, existing_filenames)
 
@@ -113,12 +125,13 @@ def sync(
 
     duration = round(time.time() - start, 2)
     logger.info(
-        "Sync complete: added=%d removed=%d thumbs=%d duration=%.2fs",
-        added, removed, thumbs_generated, duration,
+        "Sync complete: added=%d updated=%d removed=%d thumbs=%d duration=%.2fs",
+        added, updated, removed, thumbs_generated, duration,
     )
 
     return {
         "added": added,
+        "updated": updated,
         "removed": removed,
         "thumbs_generated": thumbs_generated,
         "duration_sec": duration,