Renames 314 defs and 41 module/class-level constants. Keeps 11 names underscored where the stripped form collides in scope, plus 5.5.0 shims for the three symbols external service repos call.
Optional Episode.air_date names daily/sports content by date instead of SxxExx (no template change). Presentation-only; `{year}` dropped only when it duplicates the date's year. Round-trips via export/import.