Consolidate Dependabot update noise by grouping weekly dependency PRs

[Copilot]

Dependabot was opening multiple update PRs each week, increasing review overhead and queue noise. This change configures grouped updates so each ecosystem emits a single weekly dependency PR.

• What changed

  • Added groups configuration to .github/dependabot.yml for both configured ecosystems:
    • gomod
    • github-actions
  • Group name: all-dependencies
  • Match rule: patterns: ["*"] (all updates in that ecosystem are batched together)

• Resulting behavior

  • Weekly runs now produce at most one Dependabot PR per ecosystem instead of many per dependency.

• Config example

  - package-ecosystem: "gomod"
    directory: "/"
    schedule:
      interval: "weekly"
    groups:
      all-dependencies:
        patterns:
          - "*"

[coveralls]

coverage: 82.508% (-0.09%) from 82.596% — copilot/consolidate-dependabot-prs into master