Fix Dependabot auto-merge workflow permissions

Add checks: read permission to Dependabot Auto-Merge workflow to allow
it to query check runs via the GitHub API.

Changes:
- Added checks: read to workflow permissions
- Updated lewagon/wait-on-check-action from v1.3.4 to v1.4.1

This resolves: "403 - Resource not accessible by integration" error
when the auto-merge workflow tries to query check-runs API.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: the-mace

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

@@ -7,6 +7,7 @@ on:
 permissions:
   contents: write
   pull-requests: write
+  checks: read
 
 jobs:
   auto-approve:
@@ -54,7 +55,7 @@ jobs:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
 
       - name: Wait for CI checks
-        uses: lewagon/wait-on-check-action@v1.3.4
+        uses: lewagon/wait-on-check-action@v1.4.1
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           check-name: 'All checks passed'