Fix first: upgrade to v1.10.0 or later. The package was not rolling back correctly on error.

1. Upgrade @planetscale/database to v1.10.0+.
2. Re-run the failing tests. Expected: locks release on error; the reporter confirmed their previously failing tests passed.

When to use: @planetscale/database holds locks for 20 seconds after a transaction error.

When not to use: other lock issues (different causes).

Compatibility: @planetscale/database v1.10.0+. Reported in planetscale/database-js#124.

Variants:
- "planetscale locks not released"
- "planetscale transaction rollback"
- "database-js 124"

Root cause: the package wasnt rolling back correctly on error.

Edge cases: none; the fix is version-bound.