v0.5.4

What's Changed

• chore: post-release sync for v0.5.3 by @github-actions[bot] in #149
• fix(#143): retarget CME guard to vanilla component serializers (v0.5.4 hotfix) by @ghov-claude[bot] in #152

New Contributors

• @ghov-claude[bot] made their first contribution in #152

Full Changelog: v0.5.3...v0.5.4

Test status (this mint)

• Fast tier (ci.yml, run as part of this mint): unit tests
  (scripts/ci/tests) + all static checks (scripts/ci/run_all.py).
  PASSED (required before this release was built - see this run's
  own fast-tier job).
• Boot tier (boot.yml, run as part of this mint): L0 boot smoke
  • L1 selftest - an actual resolved-mods dedicated-server boot plus a
    live /vpp_selftest run. PASSED (required before this release was
    built - see this run's own boot-tier job).
• L2 HeadlessMC client smoke (scripts/tests/l2_client_smoke.py)
  did NOT run as part of this release. It is local-dev-sandbox-only
  per HANDOFF.md's "Release pipeline" section (needs a persistent
  HeadlessMC research instance + a local ~/.minecraft, neither of
  which exist on a hosted Actions runner). Rendering correctness, a
  live client join (L3), and multiplayer interaction remain unverified
  by this pipeline - see DESIGN.md's "Release engineering" section
  for the full L0-L3 boundary this project discloses on every release.