Canonical: fix ruff lint (B023 loop-bound lambda, S110 bare except-pass)

- B023: default_fetch_tracklist built a per-item lambda closing over the loop
  variable `it`. Replaced with a module-level _item_get(item, key, default)
  helper (takes the item as a param — no closure). Behavior unchanged; the
  dict/object normalization test still passes.
- S110: the two best-effort guards in the canonical job (skip-already-pinned
  read, estimate_scope active-server read) now carry `# noqa: S110 — <reason>`,
  matching the repo's existing convention for intentional swallow-and-continue.

ruff check passes on all canonical files + tests; 30 affected tests green.

core/metadata/canonical_resolver.py

@@ -138,6 +138,11 @@ def resolve_canonical_for_album(
     }
 
 
+def _item_get(item: Any, key: str, default: Any = None) -> Any:
+    """Read ``key`` from a track item that may be a dict or an object."""
+    return item.get(key, default) if isinstance(item, dict) else getattr(item, key, default)
+
+
 def default_fetch_tracklist(source: str, album_id: str) -> Optional[List[Dict[str, Any]]]:
     """Production ``fetch_tracklist``: pull a release's tracklist from a metadata
     source and normalise to ``{title, track_number, duration_ms}``. Duration is
@@ -155,14 +160,13 @@ def default_fetch_tracklist(source: str, album_id: str) -> Optional[List[Dict[st
         items = items.get('items') or []
     out: List[Dict[str, Any]] = []
     for it in items:
-        get = it.get if isinstance(it, dict) else (lambda k, d=None: getattr(it, k, d))
-        dur = get('duration_ms')
+        dur = _item_get(it, 'duration_ms')
         if dur is None:
-            secs = get('duration')  # some sources give seconds
+            secs = _item_get(it, 'duration')  # some sources give seconds
             dur = int(secs * 1000) if isinstance(secs, (int, float)) and secs else None
         out.append({
-            'title': get('name') or get('title') or '',
-            'track_number': get('track_number'),
+            'title': _item_get(it, 'name') or _item_get(it, 'title') or '',
+            'track_number': _item_get(it, 'track_number'),
             'duration_ms': dur,
         })
     return out or None

core/repair_jobs/canonical_version_resolve.py

@@ -168,7 +168,7 @@ class CanonicalVersionResolveJob(RepairJob):
                     result.skipped += 1
                     result.scanned += 1
                     continue
-            except Exception:
+            except Exception:  # noqa: S110 — best-effort skip check; on read error just resolve it
                 pass
 
             try:
@@ -216,6 +216,6 @@ class CanonicalVersionResolveJob(RepairJob):
         if context.config_manager:
             try:
                 active_server = context.config_manager.get_active_media_server()
-            except Exception:
+            except Exception:  # noqa: S110 — best-effort; fall back to no server filter
                 pass
         return len(self._load_album_ids(context.db, active_server))