Update skills for latest PlanetScale changelog entries

[cursor]

Summary

• Document that Vitess deploy request approvals are automatically dismissed when schema changes occur after approval, and queued requests must be reviewed and queued again.
• Document the new pscale role list and pscale password list --name / --status filters for targeted credential inventory.

Changelog entries

• https://planetscale.com/changelog/updates-to-deploy-request-approvals
• https://planetscale.com/changelog/pscale-role-password-filters

Verification

• git diff --check HEAD~1..HEAD