Enable test execution in CI pipeline

- Add 'make test' step to PR build workflow
- Tests run after build and before code formatting checks
- Ensures all pull requests pass unit and integration tests

Co-authored-by: djeada <[email protected]>

.github/workflows/pr-build.yml

@@ -28,6 +28,9 @@ jobs:
       - name: Build project
         run: make build
 
+      - name: Run tests
+        run: make test
+
       - name: Check code formatting
         run: make format-check