ci: temporary debug step for WATCHTOWER_TOKEN context resolution

.gitea/workflows/docker.yaml

@@ -6,6 +6,15 @@ jobs:
   build-and-push:
     runs-on: ubuntu-latest
     steps:
+      - name: 🩺 Debug token context
+        env:
+          VARS_TOKEN: ${{ vars.WATCHTOWER_TOKEN }}
+          SECRETS_TOKEN: ${{ secrets.WATCHTOWER_TOKEN }}
+        run: |
+          echo "vars.WATCHTOWER_TOKEN length: ${#VARS_TOKEN}"
+          echo "secrets.WATCHTOWER_TOKEN length: ${#SECRETS_TOKEN}"
+          echo "vars first/last 2 chars: ${VARS_TOKEN:0:2}..${VARS_TOKEN: -2}"
+
       - name: 📥 Checkout code
         uses: https://github.com/actions/checkout@v4