chore: upgrade caretaker to v0.10.0

[Copilot]

Upgrades the caretaker autonomous maintenance system from 0.5.2 to v0.10.0, which introduces PR-workflow noise reduction and self-trigger loop prevention.

Changes

• .github/maintainer/.version — bumped to 0.10.0
• .github/workflows/maintainer.yml — added dispatch-guard job (new in v0.10.0) that filters out webhook events originating from caretaker itself before the maintain job runs:
  • Drops issue_comment events carrying a <!-- caretaker:* --> marker or authored by known bot logins
  • Drops pull_request_review events from copilot-pull-request-reviewer[bot]
  • maintain now needs: dispatch-guard and gates on should_run == 'true'

dispatch-guard:
  runs-on: ubuntu-latest
  outputs:
    should_run: ${{ steps.guard.outputs.should_run }}
  steps:
    - id: guard
      uses: actions/github-script@v7
      # ... filters caretaker-authored comments to break feedback loops

maintain:
  needs: dispatch-guard
  if: ${{ needs.dispatch-guard.outputs.should_run == 'true' }}

This eliminates the feedback loop where every caretaker status comment triggered a new caretaker run (observed at up to 16+ duplicate comment cycles per PR upstream).

[github-actions]

🏠 Caretaker Status

Status: ⏳ Monitoring — awaiting requirements

Readiness Score: 20%

Readiness Breakdown

Component	Score
Mergeable & non-draft	0%
Automated feedback	20%
Reviews approved	0%
CI passing	0%
Total	20%

Blockers

• draft_pr
• required_review_missing
• ci_pending

Ownership

• Owner: caretaker
• Claimed: 2026-04-20 08:28 UTC

---

This comment is edited in place as the PR progresses. Automated by Caretaker.

[github-actions]

🏠 Caretaker Status

Status: ⏳ Monitoring — awaiting requirements

Readiness Score: 20%

Readiness Breakdown

Component	Score
Mergeable & non-draft	0%
Automated feedback	20%
Reviews approved	0%
CI passing	0%
Total	20%

Blockers

• draft_pr
• required_review_missing
• ci_pending

Ownership

• Owner: caretaker
• Claimed: 2026-04-20 08:28 UTC

---

This comment is edited in place as the PR progresses. Automated by Caretaker.

[ianlintner]

Superseded by #34, which already merged the v0.10.0 upgrade. This draft branch also still uses the old pip install "caretaker @ git+..." spec, which fails because the Python distribution name is caretaker-github. The fixed install line is already on main via #34; closing this duplicate.