The original migration created a unique constraint on app_version_id,
but with Python bundle support each app version can have multiple bundles
(one per language). Revert the inline edit to the original migration and
add a proper migration that discovers and drops the single-column unique
constraint and redundant index before the composite unique index on
(app_version_id, language) is created.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
