Add test workflow for DSW runner

.gitea/workflows/test-runner.yml

@@ -0,0 +1,37 @@
+name: Test DSW Runner
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  test-runner:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Test Runner Environment
+        run: |
+          echo "=== Runner Test Started ==="
+          echo "Runner hostname: $(hostname)"
+          echo "Runner OS: $(uname -a)"
+          echo "Current directory: $(pwd)"
+          echo "User: $(whoami)"
+          echo "Date: $(date)"
+          echo "=== Environment Variables ==="
+          env | grep -E '^(RUNNER|GITHUB|CI)' || echo "No CI env vars found"
+          echo "=== Runner Test Completed ==="
+
+      - name: Check Docker availability
+        run: |
+          echo "Checking Docker..."
+          docker --version || echo "Docker not available"
+          docker ps || echo "Cannot list containers"
+
+      - name: Test network connectivity
+        run: |
+          echo "Testing network..."
+          ping -c 2 gitea.tailnet-68f9.ts.net || echo "Cannot ping Gitea"
+          curl -s -o /dev/null -w "%{http_code}" https://gitea.tailnet-68f9.ts.net || echo "Cannot reach Gitea HTTPS"