chore(dot_alfred): Phase 5 cleanup + changelog

Delete the orphan MediaWithTracks mixin (and its only consumer,
track_lang_matches) from alfred.domain.shared.media — zero callers
since the v2 aggregates landed in Phase 3, parked for the Phase 5
decision in CHANGELOG.

Cleanup sweep across alfred/ and tests/ returns zero hits for:
* MediaWithTracks
* the v1 dot_alfred symbols
* the v1 sidecar names
* the alfred.application.library package
The v2 surface is the only one left.

CHANGELOG updated with:
* the Phase 5 sync orchestrators (sync_show / sync_movie),
* the Phase 4b PACK vs EPISODIC fix (Fixed section),
* the MediaWithTracks deletion in Removed,
* refreshed suite count (1277 passing).

CHANGELOG.md

@@ -41,7 +41,7 @@ callers).
     season becomes `SeasonRelease(mode=PACK, folder=…, episodes=())`.
     The slot map stays empty until the Phase 5 TMDB sync supplies
     `episode_count` — no fabricated `EpisodeRange` lands in the
-    sidecar.
+    sidecar. *(Superseded by Phase 4b — see Fixed.)*
 - **`Settings.tmdb_cache_ttl_days: int = 14`** — placeholder for the
   Phase 5 TTL policy on library-index entries (`fetched_at + TTL`
   drives refresh decisions).
@@ -52,6 +52,57 @@ callers).
   `WARNING` (one per missing folder, with `tmdb_id`); the heal path
   stays silent by construction (it always synthesizes from real
   folder names).
+- **`.alfred` v2 — Phase 5: TMDB sync orchestrators.** Fifth phase
+  of `specs/dot_alfred_v2.md` on branch `refactor/dot-alfred-v2`.
+  Two new orchestrators refresh the library-root index's
+  TMDB-cached fields from on-disk truth + a single TMDB call:
+  - **`sync_show`** (`alfred/application/tv_shows/sync.py`) calls
+    `TMDBClient.get_tv_show_info`, loads the release via
+    `DotAlfredSeriesReleaseRepository.load_by_tmdb_id`, and upserts
+    the result into `DotAlfredTVShowLibraryIndex`. Honors
+    `Settings.tmdb_cache_ttl_days`; placeholder entries (auto-healed,
+    `status == "unknown"`) always refresh; `force=True` overrides
+    both gates. Raises `ShowNotFoundInLibrary` when neither index nor
+    sidecar carry `tmdb_id`. Indexed shows with a missing per-show
+    sidecar still get a fresh TMDB pass — slot map clears until
+    rescan repopulates it.
+  - **`sync_movie`** (`alfred/application/movies/sync.py`) is the
+    movie-side parallel. Placeholder signature is `name ==
+    metadata.path` (auto-heal copies the folder name into `name`;
+    the sidecar schema requires `name` non-empty so we can't use
+    `name == ""`). When the per-movie sidecar is gone but the
+    index entry remains, sync warns and returns the existing entry
+    unchanged (no upsert possible without a release).
+- **`TmdbMovieInfo` DTO + `TMDBClient.get_movie_info`** — symmetric
+  to the existing `TmdbShowInfo` / `get_tv_show_info` pair. Carries
+  `tmdb_id`, `imdb_id`, `title`, and `release_year` (parsed from
+  TMDB's `release_date`).
+- **`load_by_tmdb_id` on the v2 release repositories.** The series
+  repo returns `(SeriesRelease, show_folder_name)` so the sync
+  orchestrator can feed `DotAlfredTVShowLibraryIndex.upsert(...,
+  path=...)`; the movie repo returns `MovieRelease` alone (folder is
+  on `release.folder` already) and is provided as a semantic alias
+  of `find_by_tmdb_id` for symmetry.
+- **`alfred/application/exceptions.py`** — new module for the two
+  shared `*NotFoundInLibrary` exceptions raised by the sync
+  orchestrators (`ShowNotFoundInLibrary`, `MovieNotFoundInLibrary`).
+
+### Fixed
+
+- **PACK vs EPISODIC classification (Phase 4b).** The Phase 4
+  walker + `rescan_show` logic classified seasons by parser output
+  (does the filename carry `Exx`?), but PACK vs EPISODIC is a
+  *structural* distinction:
+  - **PACK** = season folder with N flat `SxxEyy` videos.
+  - **EPISODIC** = season folder with N subfolders, each holding
+    one video.
+  The walker now descends two levels under `show_root` and
+  classifies per season folder. Mixed (flat + subfolders) is
+  malformed — warn and skip. `rescan_show` trusts the walker's
+  mode and stops conflating "single un-numbered video" with PACK
+  (that case is now skipped as malformed too). Tests rewritten
+  against the real model. Supersedes the PACK-semantics bullet
+  above in Added.
 
 ### Removed
 
@@ -67,16 +118,18 @@ callers).
 - The two Phase 3 module-level test skips
   (`test_repository.py`, `test_serializer.py`) are lifted by
   deleting the quarantined files.
+- **`MediaWithTracks` mixin + `track_lang_matches` helper** in
+  `alfred.domain.shared.media`. Parked in Phase 4 pending a
+  Phase 5 decision; zero callers across `alfred/` and `tests/`
+  after the v2 aggregates landed, so both go.
 
 ### Internal
 
-- **Suite**: 1233 → 1237 passing; 10 → 8 skips (only LLM-not-running
+- **Suite**: 1233 → 1277 passing; 10 → 8 skips (only LLM-not-running
   skips remain — the Phase 3 quarantines are gone with their files).
-- The `MediaWithTracks` mixin in `alfred.domain.shared.media` is
-  orphaned after Phase 3 (no aggregate inherits it). **Parked for
-  Phase 5**, which will either mount it on `MovieRelease` /
-  `SeasonRelease` (both already carry `audio_tracks` +
-  `subtitle_tracks`) or remove it for good.
+- Phase 5 cleanup sweep returns zero hits for `MediaWithTracks`,
+  v1 dot_alfred symbols, v1 sidecar names, and `alfred.application.
+  library` — the v2 surface is the only one left.
 
 ### Changed