ci: repo hygiene — ruff-format, delete dead automation, defang renovate

[florianhorner]

Summary

Repo hygiene: remove dead inherited automation, align the formatter with local
tooling, and defang unsafe defaults. No product code behavior changes. [proof: config]

Changes

Formatter (stops the recurring churn)

• Replace black with ruff-format in pre-commit. Editors run ruff format but CI
  used black; they disagreed on a few constructs, producing phantom diffs on every
  Python edit. One formatter end-to-end fixes it. Ignored COM812/ISC001 (they conflict
  with the formatter). Only 4 files needed reformatting. [proof: config]

Delete dead community automation / stale workflows

• .github/ISSUE_TEMPLATE/ (Issues are disabled; links/labels point upstream),
  config.yml + auto-comment.yml (welcome bots not installed), toc.yaml
  (3-yr-stale third-party action), release-drafter workflow + config (release.yml
  never consumes the draft; it left an orphan draft, now deleted).

Trim noisy / unsafe CI behavior

• docs.yml: upload the Pages artifact on push only (PRs can't deploy).
• markdown-code-runner.yml: keep the PR drift-gate, drop the push-to-main
  auto-commit (it raced with toc.yaml and re-triggered every push workflow).
• renovate.json: disable automerge (no branch protection yet) and the dead
  dependencyDashboard (Issues disabled).

Notes / deferred

• toc.yaml deletion: the README TOC no longer auto-regenerates; it rarely changes and
  can be run manually (folding doctoc into scripts/update-generated-content was left
  as a small follow-up).
• Still pending from the plan: version reconcile (manifest/pyproject 1.30.1 vs
  release tags) + a CONTRIBUTING.md, and enabling required-status-checks (branch
  protection) now that the trimmed check names are final.

Proof

• config: .pre-commit-config.yaml — black hook replaced with ruff-format [proof: config]
• lint: .ruff.toml — COM812/ISC001 ignored to avoid formatter conflicts; ruff check + ruff format both pass locally [proof: lint]
• tests: n/a — no test logic changed; 4 files were reformatted only [proof: tests]
• build: n/a — no build step in this change [proof: build]
• runtime: n/a — tooling/CI hygiene change; this PR's own checks are the runtime verification [proof: runtime]

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

📝 Walkthrough

Release Notes

Formatter migration: Black → Ruff

• Code formatting now uses ruff-format instead of black in pre-commit configuration. Config rules COM812 (trailing comma) and ISC001 (implicit string concatenation) are ignored to avoid formatter conflicts. Four files were reformatted to match ruff standards.

Removed community automation

• Deleted GitHub issue templates (bug report, documentation, enhancement, feature)
• Deleted .github/config.yml (welcome bot comments)
• Deleted .github/auto-comment.yml
• Deleted release-drafter workflow and config (no longer generating draft releases on main pushes)
• Deleted automatic TOC generation workflow (README.md TOC must be updated manually)

CI/deployment changes

• Docs artifact upload now occurs on push to main only; PRs still build as a sanity check
• Markdown code runner workflow changed to drift-gate only (fails if generated files are stale); removed auto-commit/push behavior
• Renovate: disabled automerge and dependency dashboard

Note: No breaking changes to product behavior. Pending: reconcile manifest/pyproject version numbers and enable branch protection rules once status checks are finalized.

Walkthrough

This PR performs repository maintenance by removing unused GitHub issue templates and automation configurations, disables Renovate dashboard and automerge features, modifies workflow behavior (documentation artifact gating and generated-content drift detection), updates development tooling (black→ruff-format, additional Ruff lint rules), and refactors test assertions for clearer failure messages.

Changes

Repository Maintenance and Quality Improvements

Layer / File(s)	Summary
Renovate Configuration Updates .github/renovate.json	Disables dependency dashboard and automerge features in Renovate configuration.
GitHub Actions Workflow Modifications .github/workflows/docs.yml, .github/workflows/markdown-code-runner.yml	Documentation workflow uploads Pages artifacts only on non-PR pushes; generated-content workflow switches from auto-commit to drift-detection mode that fails on stale files.
Development Tooling Configuration .pre-commit-config.yaml, .ruff.toml	Pre-commit formatter migrated from black to ruff-format; COM812 and ISC001 Ruff rules added to global ignore list.
Test Assertion Improvements tests/test_init.py, tests/test_switch.py	Test assertions refactored with multi-line failure messages; non-HA change detection test expanded to explicitly validate brightness and color attributes; manual-control, warning-count, and light-group-expansion tests use clearer assertion context.
Documentation and Code Formatting custom_components/adaptive_lighting/const.py, webapp/app.py	Configuration documentation strings tightened for formatting consistency; y-axis tick label expression updated for readability.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• florianhorner/adaptive-lighting#13: Adds comprehensive coverage for expand_light_groups behavior and warning paths; complements this PR's assertion improvements to the same test areas.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	Title follows conventional commits format with 'ci:' prefix, is exactly 71 characters (under 72 limit), uses specific and descriptive terms, and accurately summarizes the main changes.
Description check	✅ Passed	Description is directly related to the changeset, providing detailed explanations of formatter changes, deleted automation, CI behavior modifications, and the rationale behind each change.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch florianhorner/ci-hygiene

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