Add watch providers (where to stream/rent/buy)

New TMDb integration end to end: append_to_response "watch/providers",
normalizer parsing grouped by country/monetization type, a WatchProvider
catalog entry (external-id keyed, same get_or_create pattern as Company/
Collection/Person) + polymorphic WatchProviderOffering table (new
migration 0002), ingestion write (including provider logos via the
existing Artwork table), and API exposure -- embedded on movie/series
detail plus a dedicated /watch-providers sub-route, shaped to mirror
TMDb's own response for easy porting.

Note: this data comes from JustWatch via TMDb and carries its own
attribution requirement separate from TMDb's general one -- flagged in
docs/api.md, must be satisfied before showing this in the frontend.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

app/services/ingestion/movie_ingestion.py

@@ -271,6 +271,23 @@ async def ingest_movie(
     await polymorphic.sync_release_dates(
         session, entity_type="movie", entity_id=movie.id, release_dates=normalized.release_dates
     )
+    touched_watch_providers = await polymorphic.sync_watch_providers(
+        session,
+        entity_type="movie",
+        entity_id=movie.id,
+        tmdb_provider_id=tmdb_provider.id,
+        offerings=normalized.watch_providers,
+    )
+    for watch_provider, logo_path in touched_watch_providers:
+        logo = company_logo_artwork(logo_path)
+        if logo is not None:
+            await polymorphic.sync_artwork(
+                session,
+                entity_type="watch_provider",
+                entity_id=watch_provider.id,
+                provider_id=tmdb_provider.id,
+                artwork_list=[logo],
+            )
     await _link_external_ids(session, movie.id, tmdb_provider.id, normalized)
 
     await session.execute(

app/services/ingestion/series_ingestion.py

@@ -266,6 +266,23 @@ async def ingest_series(
     await polymorphic.sync_release_dates(
         session, entity_type="series", entity_id=series.id, release_dates=normalized.release_dates
     )
+    touched_watch_providers = await polymorphic.sync_watch_providers(
+        session,
+        entity_type="series",
+        entity_id=series.id,
+        tmdb_provider_id=tmdb_provider.id,
+        offerings=normalized.watch_providers,
+    )
+    for watch_provider, logo_path in touched_watch_providers:
+        logo = company_logo_artwork(logo_path)
+        if logo is not None:
+            await polymorphic.sync_artwork(
+                session,
+                entity_type="watch_provider",
+                entity_id=watch_provider.id,
+                provider_id=tmdb_provider.id,
+                artwork_list=[logo],
+            )
 
     for stub in normalized.seasons:
         season = await tv_repository.get_or_create_season(session, series.id, stub.season_number)