Add mcp dependency to root project dev group

- Added mcp>=1.9.4 to root project's dev dependencies to fix test failures
- This resolves ImportError: No module named 'mcp' in test files

Co-authored-by: Daniel Chalef <danielchalef@users.noreply.github.com>

pyproject.toml

@@ -55,6 +55,7 @@ dev = [
     "pytest-asyncio>=0.24.0",
     "pytest-xdist>=3.6.1",
     "ruff>=0.7.1",
+    "mcp>=1.9.4",
 ]
 
 [build-system]