Update Renovate configuration for best practices (INT-356)

[glaracuente]

what

• Rename .github/renovate.json to .github/renovate.json5 to keep aligned with our other repos.
• Switch from config:base to config:best-practices to keep aligned with our other repos, and enhance security on this repo in general.
• Set minimumReleaseAge: 3 days globally so Renovate waits 3 days after any release before opening an upgrade PR. This applies to all managed dependency types.
• Add github-actions to enabledManagers. We also want to make sure we enable pinDigests: true here, but that is already handled since we use config:best-practices, which includes this. Renovate will now track workflow dependencies and pin them to immutable SHA digests instead of mutable version tags. We are already doing this in practice, but this enforces it in a maintainable way.

why

The minimumReleaseAge window gives the community time to discover and report bugs or vulnerabilities in newly published releases before we adopt them. Without it, Renovate could open a PR for a release within minutes of it being published — before any post-release issues are known.

Pinning GitHub Actions to SHA digests removes a supply chain attack vector: a compromised or malicious actor could rewrite a version tag (e.g. v4) to point at different code without any visible change to our workflow files. A pinned digest is immutable and tied to a specific commit. Renovate's digest update PRs will keep those pins current over time.

references

• INT-356

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Configuration used: defaults

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📥 Commits

Reviewing files that changed from the base of the PR and between d6bddab and 22c428f.

📒 Files selected for processing (1)

• .github/renovate.json5

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/INT-356/renovate_min_age_pin_digests

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