Lint: log instead of bare except-pass in two best-effort paths (ruff S110)

The album_tracks cache store (deezer_client) and the mutagen audio-length probe
(hifi_client) swallowed errors with try/except/pass. ruff S110 (selected by the
project) flagged them — they were the only 2 lint errors app-wide. Log at debug
instead. ruff check . now passes clean.

core/deezer_client.py

@@ -148,8 +148,8 @@ def resolve_album_track_positions(session, base_url, album_ids, cache=None, slee
                     if cache and at_list is not None:
                         try:
                             cache.store_entity('deezer', 'album_tracks', aid, {'data': at_list})
-                        except Exception:   # noqa: BLE001
-                            pass
+                        except Exception as _cache_err:   # noqa: BLE001
+                            logger.debug("album_tracks cache store failed for %s: %s", aid, _cache_err)
             except Exception:   # noqa: BLE001 - never let metadata resolution break the fetch
                 at_list = None
         for at in (at_list or []):

core/hifi_client.py

@@ -801,8 +801,8 @@ class HiFiClient(DownloadSourcePlugin):
             info = getattr(mf, 'info', None) if mf is not None else None
             if info is not None:
                 return float(getattr(info, 'length', 0) or 0)
-        except Exception:
-            pass
+        except Exception as _probe_err:   # noqa: BLE001
+            logger.debug("mutagen audio-length probe failed for %s: %s", path, _probe_err)
         return 0.0
 
     @staticmethod