fix: use public CDN URL for remote runner compatibility

- Set ROBUST_CDN_URL to https://cdn.wylab.me/ for remote runner access
- Add cache server availability probing to prevent 502 errors
- Update publish script to respect ROBUST_CDN_URL environment variable
- Fix Docker trigger dispatch API endpoint format

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.github/actions/cache-dotnet/action.yml

@@ -3,11 +3,39 @@ description: Cache NuGet packages using Gitea Actions cache server
 runs:
   using: composite
   steps:
+    - name: Probe cache server
+      id: probe-cache
+      shell: bash
+      run: |
+        set -euo pipefail
+        url="${ACTIONS_CACHE_URL:-}"
+        if [ -z "$url" ]; then
+          echo "CACHE_AVAILABLE=false" >> "$GITHUB_ENV"
+          echo "No ACTIONS_CACHE_URL set; skipping cache."
+          exit 0
+        fi
+        python - <<'PY'
+import os, socket, sys, urllib.parse
+url = os.environ.get("ACTIONS_CACHE_URL", "")
+parsed = urllib.parse.urlparse(url)
+host, port = parsed.hostname, parsed.port or (443 if parsed.scheme == "https" else 80)
+ok = False
+try:
+    with socket.create_connection((host, port), timeout=2):
+        ok = True
+except OSError:
+    ok = False
+print(f"probe {host}:{port} ok={ok}")
+with open(os.environ["GITHUB_ENV"], "a") as f:
+    f.write(f"CACHE_AVAILABLE={'true' if ok else 'false'}\n")
+PY
+
     - name: Cache NuGet packages
-      uses: actions/cache@v3
+      uses: actions/cache@v4
+      if: env.CACHE_AVAILABLE == 'true'
       with:
         path: |
           ~/.nuget/packages
         key: ${{ runner.os }}-nuget-${{ github.run_id }}
         restore-keys: |
-          ${{ runner.os }}-nuget-
+          ${{ runner.os }}-nuget-

.github/workflows/publish.yml

@@ -122,6 +122,7 @@ PY
         PUBLISH_TOKEN: ${{ secrets.PUBLISH_TOKEN }}
         GITHUB_REPOSITORY: wylab/wylab-station-14
         FORK_ID: wylab
+        ROBUST_CDN_URL: https://cdn.wylab.me/
       if: ${{ steps.cdn-check.outputs.skip != 'true' }}
 
     - name: Trigger Docker image rebuild
@@ -138,8 +139,8 @@ PY
         curl -sSL -X POST \
           -H "Authorization: token ${DISPATCH_TOKEN}" \
           -H "Content-Type: application/json" \
-          https://git.wylab.me/api/v1/repos/${TARGET_REPO}/dispatches \
-          -d "{\"event_type\":\"ss14-package-ready\",\"client_payload\":{\"commit\":\"${PAYLOAD}\"}}"
+          https://git.wylab.me/api/v1/repos/${TARGET_REPO}/actions/workflows/main.yml/dispatches \
+          -d "{\"ref\":\"main\",\"inputs\":{\"commit\":\"${PAYLOAD}\"}}"
 
     #    - name: Publish changelog (Discord)
     #      continue-on-error: true

Tools/publish_multi_request.py

@@ -16,7 +16,7 @@ RELEASE_DIR = "release"
 # CONFIGURATION PARAMETERS
 # Forks should change these to publish to their own infrastructure.
 #
-ROBUST_CDN_URL = "https://cdn.wylab.me/"
+ROBUST_CDN_URL = os.environ.get("ROBUST_CDN_URL", "https://cdn.wylab.me/")
 
 def main():
     parser = argparse.ArgumentParser()