ci(deps): auto-approve / auto-merge dependencies from dependabot

[mwbrooks]

Summary

Add a GitHub Actions workflow to auto-approve and auto-merge Dependabot pull requests for patch and minor version updates.

This reduces maintenance burden by automatically handling low-risk dependency updates while still requiring manual review for major version bumps.

Repository Settings Required

To enable auto-merge functionality, the following repository settings must be configured:

• Settings → General → Pull Requests

  • ✅ Allow auto-merge

• Settings → Branches → main branch protection rule

  • ✅ Require status checks to pass before merging
    • Add required checks: Build, Unit Tests

• Settings → Actions → General → Workflow permissions

  • ✅ Allow GitHub Actions to create and approve pull requests

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.68%. Comparing base (7d9a5cf) to head (7a7e361).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #92   +/-   ##
=======================================
  Coverage   94.68%   94.68%           
=======================================
  Files          11       11           
  Lines         207      207           
=======================================
  Hits          196      196           
  Misses         11       11           

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[zimeg]

LGTM - clean dependabot auto-merge workflow

[mwbrooks]

Thanks @zimeg for the quick review!

Everything was configured correctly on this PR and I did not add any additional required status checks.