Handle missing gRPC extension in workflow

Author: jeromegamez

.github/workflows/grpc-tests.yml

@@ -75,6 +75,17 @@ jobs:
       - name: Setup problem matchers for PHP
         run: echo "::add-matcher::${{ runner.tool_cache }}/php.json"
 
+      - name: Detect gRPC extension
+        id: grpc
+        run: |
+          if php -m | grep -qi '^grpc$'; then
+            echo "grpc_present=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "grpc_present=false" >> "$GITHUB_OUTPUT"
+            echo "COMPOSER_IGNORE_PLATFORM_REQ=ext-grpc" >> "$GITHUB_ENV"
+            echo "gRPC extension not available; allowing Composer to proceed without ext-grpc."
+          fi
+
       - uses: "ramsey/composer-install@v3"
 
       - name: Setup Problem Matchers for PHPUnit