Skip zero-track albums in album completeness scanner

Albums with zero local tracks were flagged as incomplete but the
auto-fill fix failed because there were no existing tracks to
determine the album folder or quality standard from. Now skipped
during scan — they'll be detected once tracks are actually added.

core/repair_jobs/album_completeness.py

@@ -153,6 +153,11 @@ class AlbumCompletenessJob(RepairJob):
                     context.update_progress(i + 1, total)
                 continue
 
+            # Skip albums with zero local tracks — nothing to auto-fill from
+            if actual_count == 0:
+                result.skipped += 1
+                continue
+
             # Skip albums below minimum completion percentage
             # (filters out "1 track from a playlist import" false positives)
             if min_completion_pct > 0 and expected_total > 0: