test: tighten CI and console hygiene

(cherry picked from commit bd9e6df71c2e8a6f0902b9b7a348dc21c854141a)

.github/workflows/tests.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pyyaml>=6.0 pytest pytest-timeout pytest-asyncio
+          pip install "pyyaml>=6.0" pytest pytest-timeout pytest-asyncio
           # Install the `mcp` package so tests/test_mcp_server.py runs in CI.
           # The package is an optional runtime dep of mcp_server.py — users
           # who run the MCP integration install it themselves; CI installs