ci: Simplify workflow for watchdog build (no game source compilation)

Main branch now builds watchdog-only image that auto-updates from CDN.
Dev branch retains the full game source build workflow.

.github/workflows/main.yml

@@ -1,54 +1,28 @@
 #
-name: Build and publish wylab SS14 server
+name: Build SS14 Watchdog Server
 
-# Build whenever the Docker wrapper changes.
+# Build on main branch (watchdog) - simpler build, no game source compilation
 on:
   push:
     branches: ['main']
-  repository_dispatch:
-    types: ['ss14-package-ready']
   workflow_dispatch:
 
-# Workflow-wide defaults. Adjust IMAGE_NAME/REGISTRY if you are publishing elsewhere.
 env:
   REGISTRY: git.wylab.me
   IMAGE_NAME: wylab/ws14-docker-linux-server
-  WYLAB_SOURCE_REPO: https://git.wylab.me/wylab/wylab-station-14.git
-  WYLAB_SOURCE_REF: master
   BUILDKIT_PROGRESS: plain
 
 jobs:
   build-arm64:
-    # Requires a self-hosted macOS arm64 runner
     runs-on: [self-hosted, macos-arm64]
-    timeout-minutes: 240
+    timeout-minutes: 60
     permissions:
       contents: read
       packages: write
-    env:
-      TARGET_PLATFORM: linux-arm64
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
 
-      - name: Resolve wylab commit
-        id: wylab
-        env:
-          PAYLOAD_COMMIT: ${{ github.event.client_payload.commit }}
-        run: |
-          set -euo pipefail
-          if [ -n "${PAYLOAD_COMMIT}" ]; then
-            COMMIT="${PAYLOAD_COMMIT}"
-          else
-            REF="${WYLAB_SOURCE_REF}"
-            COMMIT=$(git ls-remote "${WYLAB_SOURCE_REPO}" "${REF}" | head -n1 | cut -f1)
-          fi
-          if [ -z "${COMMIT}" ]; then
-            echo "Unable to resolve commit to build." >&2
-            exit 1
-          fi
-          echo "commit=${COMMIT}" >> "$GITHUB_OUTPUT"
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -64,49 +38,23 @@ jobs:
         with:
           context: .
           platforms: linux/arm64
-          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-arm64
-          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-arm64,mode=max
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-watchdog-arm64
+          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-watchdog-arm64,mode=max
           push: true
           tags: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:arm64
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}-arm64
-            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.wylab.outputs.commit }}-arm64
-          build-args: |
-            SOURCE_REPO=${{ env.WYLAB_SOURCE_REPO }}
-            SOURCE_REF=${{ steps.wylab.outputs.commit }}
-            TARGET_PLATFORM=${{ env.TARGET_PLATFORM }}
 
   build-amd64:
-    # Requires a self-hosted Linux amd64 runner
     runs-on: [self-hosted, linux-amd64]
-    timeout-minutes: 240
+    timeout-minutes: 60
     permissions:
       contents: read
       packages: write
-    env:
-      TARGET_PLATFORM: linux-x64
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
 
-      - name: Resolve wylab commit
-        id: wylab
-        env:
-          PAYLOAD_COMMIT: ${{ github.event.client_payload.commit }}
-        run: |
-          set -euo pipefail
-          if [ -n "${PAYLOAD_COMMIT}" ]; then
-            COMMIT="${PAYLOAD_COMMIT}"
-          else
-            REF="${WYLAB_SOURCE_REF}"
-            COMMIT=$(git ls-remote "${WYLAB_SOURCE_REPO}" "${REF}" | head -n1 | cut -f1)
-          fi
-          if [ -z "${COMMIT}" ]; then
-            echo "Unable to resolve commit to build." >&2
-            exit 1
-          fi
-          echo "commit=${COMMIT}" >> "$GITHUB_OUTPUT"
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -122,17 +70,11 @@ jobs:
         with:
           context: .
           platforms: linux/amd64
-          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-amd64
-          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-amd64,mode=max
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-watchdog-amd64
+          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache-watchdog-amd64,mode=max
           push: true
           tags: |
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}
-            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.wylab.outputs.commit }}
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:amd64
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ github.sha }}-amd64
-            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.wylab.outputs.commit }}-amd64
-          build-args: |
-            SOURCE_REPO=${{ env.WYLAB_SOURCE_REPO }}
-            SOURCE_REF=${{ steps.wylab.outputs.commit }}
-            TARGET_PLATFORM=${{ env.TARGET_PLATFORM }}