refactor: extract Records sub-contexts (Search, Import, Enrichment)

Split the 450+ line Records context into focused modules:

- Records.Search — FTS5 search, SearchParser integration, genre listing
- Records.Import — MusicBrainz release/group import, release status
- Records.Enrichment — genre population, cover refresh, color extraction,
  MusicBrainz data refresh
- Records.Query — shared helpers (essential_fields, order_alphabetically macro)

Records module is now a facade with defdelegate for compile-time safety.
CRUD and PubSub stay directly in Records. Tests moved alongside each
sub-module. Zero callers changed, 886 tests pass.

backlog/tasks/ml-150 - Extract-Records-sub-contexts-to-reduce-module-size.md

@@ -1,9 +1,10 @@
 ---
 id: ML-150
 title: Extract Records sub-contexts to reduce module size
-status: To Do
+status: Done
 assignee: []
 created_date: '2026-04-30 10:47'
+updated_date: '2026-04-30 16:08'
 labels:
   - refactor
   - records
@@ -30,9 +31,56 @@ The `SearchIndex` schema, `Record` schema, `Similarity` module, `TracklistPdf`,
 
 ## Acceptance Criteria
 <!-- AC:BEGIN -->
-- [ ] #1 `Records.Search`, `Records.Import`, and `Records.Enrichment` modules exist with focused responsibilities
-- [ ] #2 Public `Records` module re-exports all previously-public functions through delegation
-- [ ] #3 All callers (LiveViews, workers, controllers, tests) continue to work without changes to their import/alias lines
-- [ ] #4 Full test suite passes with no regressions
-- [ ] #5 `@moduledoc` for each new module explains its responsibility
+- [x] #1 `Records.Search`, `Records.Import`, and `Records.Enrichment` modules exist with focused responsibilities
+- [x] #2 Public `Records` module re-exports all previously-public functions through delegation
+- [x] #3 All callers (LiveViews, workers, controllers, tests) continue to work without changes to their import/alias lines
+- [x] #4 Full test suite passes with no regressions
+- [x] #5 `@moduledoc` for each new module explains its responsibility
 <!-- AC:END -->
+
+## Implementation Notes
+
+<!-- SECTION:NOTES:BEGIN -->
+## Implementation Summary
+
+### New modules created
+
+**`Records.Search`** (`lib/music_library/records/search.ex`):
+- `essential_fields/0`, `search_records/3`, `search_records_count/2`, `list_genres/0`
+- Private: `build_search/3`, `fts_escape/1`, `fts_query_escape/1`
+- Imports `order_alphabetically` macro from `Records` (one-direction dependency, no cycle)
+
+**`Records.Import`** (`lib/music_library/records/import.ex`):
+- `get_release_status/2`, `get_artist_records/1`
+- `import_from_musicbrainz_release/2`, `import_from_musicbrainz_release_group/2`
+- Private: `get_cover_art_or_default/1`, `build_record_attrs/2`
+- Calls `Records.create_record/1` and `Records.Search.essential_fields/0`
+
+**`Records.Enrichment`** (`lib/music_library/records/enrichment.ex`):
+- `populate_genres/1`, `populate_genres_async/1`
+- `refresh_cover/1`, `refresh_cover_async/1`
+- `extract_colors/1`, `resize_cover/1`
+- `refresh_musicbrainz_data/1`, `refresh_musicbrainz_data_async/1`
+- `best_effort_extract_colors/1` (public, called from `Records.create_record/1`)
+- Private: `maybe_extract_colors/1`, `enqueue_worker/3`, `record_meta/1`
+- Calls `Records.update_record/2`
+
+### Facade (`lib/music_library/records.ex`)
+- 15 `defdelegate` calls covering all moved functions (compile-time safety)
+- `order_alphabetically` macro stays in `Records` for backward compatibility
+- CRUD (`get_record`, `create_record`, `update_record`, `delete_record`, `change_record`) and PubSub (`subscribe`, `notify_update`) stay directly in `Records`
+
+### Dependency graph (one direction only):
+```
+Records.Search → imports macro from Records
+Records.Import → calls Records, Records.Search
+Records.Enrichment → calls Records
+Records → delegates to Search, Import, Enrichment (compile-time: defdelegate only, no runtime cycle)
+```
+
+### Tests
+- `test/music_library/records_test.exs` — CRUD tests (6 tests)
+- `test/music_library/records/search_test.exs` — search tests (13 tests)
+- `test/music_library/records/import_test.exs` — import tests (3 tests)
+- `test/music_library/records/enrichment_test.exs` — enrichment tests (3 tests)
+<!-- SECTION:NOTES:END -->