Use hybrid Gitea action runners

.gitea/workflows/homelab-main.yml

@@ -8,8 +8,16 @@ name: Homelab Main
 
 jobs:
   validate:
-    runs-on: homelab-debian
+    runs-on: k8s
+    container: golang:1.23-bookworm
     steps:
+      - name: Install Toolchain (Python, Node)
+        run: |
+          set -e
+          # Install PyYAML via apt (avoiding PEP 668)
+          apt-get update && apt-get install -y --no-install-recommends python3-yaml
+          # Install Node 18 via binary (using gzipped tarball to avoid xz dependency)
+          curl -fsSL https://nodejs.org/dist/v18.19.0/node-v18.19.0-linux-x64.tar.gz | tar -xz -C /usr/local --strip-components=1
       - name: Check out repository
         run: |
           set -e