docs: reconcile CHANGELOG — 2026-W18

[care-taker-bot]

Documentation reconciliation

This PR updates CHANGELOG.md to capture the following merged pull requests:

• fix(maintainer): drop pip cache from setup-python #65: fix(maintainer): drop pip cache from setup-python
• chore(caretaker): upgrade pin v0.19.6 → v0.25.0 + thin workflow template #64: chore(caretaker): upgrade pin v0.19.6 → v0.25.0 + thin workflow template
• fix(caretaker): adopt v0.20.0 fleet workflow (OAuth2 envs) #60: fix(caretaker): adopt v0.20.0 fleet workflow (OAuth2 envs)
• chore: upgrade caretaker v0.19.4 → v0.19.6 #59: chore: upgrade caretaker v0.19.4 → v0.19.6
• feat(fleet): add CARETAKER_FLEET_SECRET for signed heartbeats #57: feat(fleet): add CARETAKER_FLEET_SECRET for signed heartbeats
• chore(caretaker): enable fleet-registry heartbeat with OAuth2 #46: chore(caretaker): enable fleet-registry heartbeat with OAuth2

Proposed changelog entry

## [2026-W18] — 2026-04-28

- enable fleet-registry heartbeat with OAuth2 (#46)
- add CARETAKER_FLEET_SECRET for signed heartbeats (#57)
- upgrade caretaker v0.19.4 → v0.19.6 (#59)
- adopt v0.20.0 fleet workflow (OAuth2 envs) (#60)
- upgrade pin v0.19.6 → v0.25.0 + thin workflow template (#64)
- drop pip cache from setup-python (#65)

---

[care-taker-bot]

@copilot Please review this generated documentation update for accuracy,
expand any cryptic titles if needed, and merge when ready.

[care-taker-bot]

⚠️ Caretaker Escalation

This PR requires human attention.

Reason: Open >24h with no human approval — needs review

The automated system has exhausted its ability to resolve this. Please review and take appropriate action.

Escalation debug dump

Generated at: 2026-05-21T15:23:31.019719+00:00

{
  "debug": {
    "copilot_attempts": 0,
    "fix_cycles": 0,
    "pr_age_hours": 565.6417450377778,
    "recommended_action": "escalate",
    "stuck_age_hours": 24,
    "stuck_confidence": 0.5,
    "stuck_reason": "abandoned"
  },
  "owner": "ianlintner",
  "pull_request": {
    "base_ref": "main",
    "draft": false,
    "head_ref": "docs/changelog-2026-W18",
    "html_url": "https://github.com/ianlintner/python_dsa/pull/66",
    "is_copilot_pr": false,
    "is_maintainer_pr": true,
    "mergeable": null,
    "number": 66,
    "state": "open",
    "title": "docs: reconcile CHANGELOG \u2014 2026-W18"
  },
  "reason": "Open >24h with no human approval \u2014 needs review",
  "repo": "python_dsa",
  "type": "pr_escalation"
}

[care-taker-bot]

Review by opencode_local (fallback parse)

opencode did not emit a structured caretaker-review JSON block; its prose response is included below.

The pull request includes changes to configuration and documentation files.
Specifically, .github/copilot-instructions.md has been updated to include instructions for the Caretaker system.
.github/workflows/maintainer.yml has been updated to reflect changes in the Caretaker workflow, including dependency management and execution modes.
CHANGELOG.md has been updated with entries from the week of April 28, 2026, detailing enhancements and dependency upgrades related to the Caretaker system and its fleet workflow.
No code changes were detected.

{
  "verdict": "APPROVE",
  "summary": "The changes involve updates to Caretaker's documentation and workflow configurations, including Copilot instructions and GitHub Actions YAML files. These appear to be maintenance or documentation updates.",
  "comments": [],
  "issue_categories": []
}

{
  "verdict": "APPROVE",
  "summary": "The changes update the Caretaker documentation and workflow configurations. The updates to `.github/copilot-instructions.md` and `.github/workflows/maintainer.yml` appear to be related to the Caretaker system's operation and setup. The `CHANGELOG.md` reflects recent updates and dependency version bumps. All changes seem to be in line with maintenance and documentation improvements.",
  "comments": [],
  "issue_categories": []
}

[care-taker-bot]

🏠 Caretaker Status

Status: ⚠️ Escalated to maintainers — caretaker has released ownership

Readiness Score: 70%

Readiness Breakdown

Component	Score
Mergeable & non-draft	10%
Automated feedback	20%
Reviews approved	0%
CI passing	40%
Total	70%

Blockers

• required_review_missing

Ownership

• Owner: caretaker
• Claimed: 2026-05-21 15:45 UTC
• Released: 2026-05-21 15:45 UTC (PR escalated)
• Duration: 5s

---

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