chore(main): release plan-manager 0.12.0

[sgrade]

🤖 I have created a release beep boop

0.12.0 (2026-06-20)

Features

• relicense to Apache-2.0 (code) + CC-BY-4.0 (docs) (a1706c8)

Bug Fixes

• ci: exempt release-please PRs from DCO check (fbd84f3)
• make Host/Origin allowlist configurable for devcontainer access (4eea369)

Documentation

• clarify tag-protection bypass in anchor-release script (0ad1cf7)
• v1-target.md (obsolete - should be reworked with autonomous reasoning) (ee8639a)

---

This PR was generated with Release Please. See documentation.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.89%. Comparing base (fbd84f3) to head (3c1f9a6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #27   +/-   ##
=======================================
  Coverage   53.89%   53.89%           
=======================================
  Files          37       37           
  Lines        2232     2232           
  Branches      344      344           
=======================================
  Hits         1203     1203           
  Misses        915      915           
  Partials      114      114           

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[sgrade]

🤖 Created releases:

• plan-manager-v0.12.0

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