feat: add Dependabot auto-merge workflow

.github/workflows/dependabot-auto-merge.yml

@@ -0,0 +1,32 @@
+name: Dependabot Auto-Merge
+on:
+  workflow_run:
+    workflows: ["Test Code"]  # Name of the test-code.yml workflow
+    types:
+      - completed
+    branches: [ main ]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot-auto-merge:
+    runs-on: ubuntu-latest
+    if: |
+      github.event.workflow_run.conclusion == 'success' &&
+      github.actor == 'dependabot[bot]'
+
+    steps:
+      - name: Fetch Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v2
+        with:
+          github-token: "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Enable auto-merge for Dependabot PRs
+        if: ${{steps.metadata.outputs.update-type != 'version-update:semver-major'}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}

README.md

@@ -161,3 +161,9 @@ poetry run python src/python_src/pull_api_documentation.py
 ## Repository History
 
 NOTE: this repository was split from [abd-vro](https://github.com/department-of-veterans-affairs/abd-vro/tree/develop/domain-ee/ee-max-cfi-app).
+
+## Automated Dependency Updates
+
+This repository uses Dependabot to keep dependencies up to date. Pull requests from Dependabot are automatically merged if:
+- All checks pass
+- The update is a minor or patch version change (major version updates require manual review)