- HasNonTerminalRequestForMBID: use named parameter @mbid so the
generated Go signature is `mbid string` instead of the misleading
`lidarrArtistMbid string` (the value applies to all three MBID
columns, not just the artist column)
- CancelLidarrRequest: comment dual role of $2 (ownership guard +
decided_by audit field) for future readers
- CompleteLidarrRequest: document the per-kind one-of-three contract
for matched_*_id parameters
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>