chore: inline self-contained house Renovate config

[bakerboy448]

Standardize Renovate to the inlined, self-contained house config (public presets only; drops any private cross-repo extends). Preserves repo-specific packageRules/ignoreDeps.

Summary by CodeRabbit

• Chores
  • Added Renovate configuration for automated dependency management with integrated security vulnerability handling and scheduled update automation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 46af784c-4460-494c-b784-f7783cb42744

📥 Commits

Reviewing files that changed from the base of the PR and between 8f7cc12 and 87f1087.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (1)

• renovate.json

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Walkthrough

A new renovate.json file is added, providing a complete inlined Renovate configuration. It defines preset extensions, a weekly schedule, PR rate and concurrency limits, labeling, range strategy, rebase behavior, vulnerability alert automerge, GitHub Actions grouping rules, major-update review gates, and lock file maintenance automation.

Changes

Renovate Dependency Update Configuration

Layer / File(s)

Summary

Full Renovate config renovate.json

Adds the complete Renovate configuration: weekly schedule and timezone, PR limits, dependencies labeling, range strategy set to bump, automerge disabled for general updates with rebase on staleness, automated automerge for vulnerability alerts with security label, package rules grouping GitHub Actions minor/patch/digest updates for automerge on green CI and holding major GitHub Actions and other major updates for review, and weekly lock file maintenance with automerge.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description is minimal and lacks the required template structure with Summary, Changes, and Test plan sections that are specified in the repository template.	Expand the description to follow the template structure: add a dedicated Summary section, provide a bulleted Changes list, and include the Test plan checklist with verification steps.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'chore: inline self-contained house Renovate config' directly describes the main change of adding an inlined renovate.json configuration file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/renovate-inline-config

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