fix(lint): log S110 bare except-pass in amazon client and worker

Three ruff S110 violations replaced with logger.debug calls:
- amazon_client.py:527 duration backfill ASIN search
- amazon_client.py:679 album metadata fetch in _fetch_album_metas
- amazon_worker.py:401 artist image backfill from albums

core/amazon_client.py

@@ -524,8 +524,8 @@ class AmazonClient:
                 for item in search_items:
                     if item.album_asin == asin and item.duration_seconds:
                         duration_map[item.asin] = item.duration_seconds * 1000
-            except Exception:
-                pass
+            except Exception as exc:
+                logger.debug("Duration backfill failed for ASIN %s: %s", asin, exc)
 
         items = [
             {
@@ -676,8 +676,8 @@ class AmazonClient:
                     with _meta_cache_lock:
                         _meta_cache[asin] = (time.monotonic(), meta)
                     metas[asin] = meta
-            except Exception:
-                pass
+            except Exception as exc:
+                logger.debug("Album metadata fetch failed for ASIN %s: %s", asin, exc)
 
         from concurrent.futures import ThreadPoolExecutor
         with ThreadPoolExecutor(max_workers=min(len(asins), 5)) as pool:

core/amazon_worker.py

@@ -398,8 +398,8 @@ class AmazonWorker:
             if not image_url:
                 try:
                     image_url = self.client._get_artist_image_from_albums(result.id)
-                except Exception:
-                    pass
+                except Exception as exc:
+                    logger.debug("Artist image from albums failed for %s: %s", result.id, exc)
             if image_url:
                 cursor.execute("""
                     UPDATE artists SET thumb_url = ?