Add the build of the memory validator to the github workflow

.github/workflows/gradle.yml

@@ -17,7 +17,7 @@ permissions:
   contents: read
 
 jobs:
-  build:
+  build_memory_footprint:
 
     runs-on: ubuntu-latest
 
@@ -39,3 +39,22 @@ jobs:
       with:
         gradle-version: 8.4
         arguments: -p play-validations memory-footprint:jar -Dmemory-footprint.git_hash=${{ env.git_hash }}
+
+  build_validator:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout project
+      uses: actions/checkout@v3
+    - name: Set up JDK 17
+      uses: actions/setup-java@v3
+      with:
+        java-version: '17'
+        distribution: 'corretto'
+        architecture: 'x64'
+    - name: Build validator
+      uses: gradle/[email protected]
+      with:
+        gradle-version: 8.4
+        arguments: -p third_party/wff :specification:validator:build