ci(test): build Astrolabe app before running tests

Add build step for Astrolabe app in CI workflow to compile frontend
assets before docker-compose starts.

Changes:
- Install Node.js 20 for Astrolabe build
- Run composer install --no-dev for Astrolabe PHP dependencies
- Run npm ci and npm run build to compile frontend assets

This ensures the Astrolabe app is properly built in CI, similar to
the existing OIDC app build process.

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

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

.github/workflows/test.yml

@@ -48,6 +48,23 @@ jobs:
       ###### Required to build OIDC App ######
 
 
+      ###### Required to build Astrolabe App ######
+
+      - name: Set up Node.js for Astrolabe
+        uses: actions/setup-node@39370e3970a6d050c480ffad4ff0ed4d3fdee5af # v4.1.0
+        with:
+          node-version: '20'
+
+      - name: Build Astrolabe app
+        run: |
+          cd third_party/astrolabe
+          composer install --no-dev --optimize-autoloader
+          npm ci
+          npm run build
+
+      ###### Required to build Astrolabe App ######
+
+
       - name: Run docker compose
         uses: hoverkraft-tech/compose-action@248470ecc5ed40d8ed3d4480d8260d77179ef579 # v2.4.2
         with: