chore(project): re-enable dependabot

.github/workflows/go-maintenance.yml

@@ -0,0 +1,51 @@
+name: Maintenance
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 12 * * 1"
+
+jobs:
+  go-mod-upgrades:
+    name: Upgrade all Go modules
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.25.7
+          cache: false
+
+      - name: Mock web assets
+        run: make mock-assets
+
+      - name: Upgrade all Go modules
+        run: go get -u ./...
+
+      - name: Run go mod tidy
+        run: go mod tidy
+
+      - name: Create Pull Request
+        id: cpr
+        uses: peter-evans/create-pull-request@v7.0.6
+        with:
+          token: ${{ secrets.GH_REPO_TOKEN }}
+          author: "Łukasz Mierzwa <l.mierzwa@gmail.com>"
+          commit-message: "chore(backend): upgrade all Go modules"
+          branch: go-mod-upgrades
+          delete-branch: true
+          title: "chore(backend): upgrade all Go modules"
+
+      - name: Check outputs
+        run: |
+          echo "Pull Request Number - ${{ steps.cpr.outputs.pull-request-number }}"
+          echo "Pull Request URL - ${{ steps.cpr.outputs.pull-request-url }}"
+
+      - name: Enable Pull Request Automerge
+        if: steps.cpr.outputs.pull-request-operation == 'created'
+        run: gh pr merge --merge --auto go-mod-upgrades
+        env:
+          GH_TOKEN: ${{ secrets.GH_REPO_TOKEN }}