Release v0.1.22

[adamziel]

Release v0.1.22

Version bump and release metadata update for v0.1.22.

Changelog draft:

• Document v0.1.21 release gate evidence (#162)
• Cover taxonomy menu reference validation (#163)
• Cover navigation block reference validation (#164)
• Cover media filesize drift validation (#165)
• Cover generated media filesize drift validation (#166)
• Cover missing media metadata validation (#167)
• Cover stale post_parent semantic references (#168)
• Cover stale term parent semantic references (#169)
• Cover stale post author semantic references (#170)
• Cover stale menu parent semantic references (#171)
• Cover stale usermeta semantic references (#172)
• Cover stale postmeta semantic references (#173)
• Cover stale termmeta semantic references (#174)
• Cover stale term taxonomy semantic references (#175)

Full changelog: v0.1.21...release/v0.1.22

Next steps

1. Review the changes in this pull request.
2. Push any additional edits to this branch (release/v0.1.22).
3. Merge this pull request to publish v0.1.22.

Merging will automatically build ForkPress binaries, create a GitHub release, and update the Homebrew formula.