ci: debug token length

.gitea/workflows/release.yml

@@ -23,6 +23,14 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Debug token length
+        run: |
+          echo "Token length: ${#TOKEN}"
+          echo "First char code: $(printf '%d' "'${TOKEN:0:1}")"
+          echo "Last char code: $(printf '%d' "'${TOKEN: -1}")"
+        env:
+          TOKEN: ${{ secrets.REGISTRY_TOKEN }}
+
       - name: Login to Gitea Registry
         uses: docker/login-action@v3
         with: