chore: add Dependabot cooldown and update auto-merge to v0.5.0

[cuioss-oliver]

Summary

• Add tiered cooldown to dependabot.yml (patch: 1d, minor: 3d, major: 7d) as supply chain security measure
• Update auto-merge caller to v0.5.0 — now auto-merges all minor/patch updates (major requires manual review)

Test plan

• CI passes
• dependabot.yml is valid YAML with cooldown on all ecosystems
• Auto-merge workflow references correct SHA

🤖 Generated with Claude Code

[gemini-code-assist]

Summary of Changes

Hello @cuioss-oliver, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request improves dependency management and supply chain security by introducing configurable cooldown periods for Dependabot updates and updating the auto-merge workflow. These changes provide more control over the timing of dependency updates and streamline the merging process for less critical version bumps.

Highlights

• Dependabot Cooldown: Implemented tiered cooldown periods for Dependabot updates in .github/dependabot.yml, setting 1 day for patch, 3 days for minor, and 7 days for major version updates for both npm and github-actions ecosystems.
• Auto-merge Workflow Update: Updated the auto-merge caller to version v0.5.0, which now automatically merges minor and patch dependency updates, while major updates still require manual review.

Changelog

• .github/dependabot.yml
  • Added cooldown configuration to the npm package ecosystem, specifying default-days, semver-major-days, semver-minor-days, and semver-patch-days.
  • Added cooldown configuration to the github-actions package ecosystem, specifying default-days, semver-major-days, semver-minor-days, and semver-patch-days.

Ignored Files

• Ignored by pattern: .github/workflows/** (1)
  • .github/workflows/dependabot-auto-merge.yml

Activity

• No human activity has occurred on this pull request yet.

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[gemini-code-assist]

Code Review

This pull request adds a tiered cooldown for Dependabot updates for both npm and github-actions ecosystems, which is a good measure for supply chain security. The configuration is duplicated, and I've suggested a refactoring using YAML anchors to improve maintainability by keeping the configuration DRY.