Enable grpc for unit tests

Author: kthota-g

.github/workflows/unit-tests.yml

@@ -55,7 +55,7 @@ jobs:
         run: |
           echo "$HOME/.cargo/bin" >> $GITHUB_PATH
       - name: Install dependencies
-        run: uv sync --dev --extra sql --extra encryption
+        run: uv sync --dev --extra sql --extra encryption --extra grpc
       - name: Run tests and check coverage
         run: uv run pytest --cov=a2a --cov-report=xml --cov-fail-under=89
       - name: Show coverage summary in log