Cut v1.1.0 release

[PAMulligan]

Goal

The v1.1.0 milestone is 96% complete (49/51 issues closed) and due May 31, 2026. Close out the remaining 2 issues, then cut the release.

Acceptance criteria

• Remaining 2 milestone issues closed
• pnpm run release:minor run cleanly
• v1.1.0 git tag pushed
• GitHub Release published with auto-generated notes
• CHANGELOG.md updated
• Milestone closed on GitHub

Notes

Depends on the package.json/tag reconciliation issue.