episodeCatalogSelectBody is the derived "mi" relation that episode catalog
hydration and preview read qualifiedListItemColumns("mi") from. The local
episode airtimes feature (26370616) added air_timezone to the shared column
lists but not to this hand-written subquery, so the outer projection
referenced mi.air_timezone, which the subquery never exposed.
Postgres returns SQLSTATE 42703 (undefined_column), which is not one of the
codes episodeCatalogEntriesUnavailable treats as "fast path unavailable" (it
only catches 42P01/42883), so episode catalog requests failed with HTTP 500
instead of degrading. movie and series scopes query media_items directly, so
the column is present there and only episode scope broke.
Add si.air_timezone to the subquery, and add a regression test asserting that
episodeCatalogSelectBody exposes every column qualifiedListItemColumns reads
off mi, so future additions to the shared column lists cannot silently drift
from the episode read model again.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
