fix: configure mypy to handle MCP library syntax errors

- Add comprehensive mypy overrides for mcp module
- Configure mypy to install types automatically in CI
- Exclude .venv directory from type checking
- This resolves pattern matching syntax errors from mcp library dependencies

Author: ryoppippi

.github/workflows/lint.yml

@@ -36,7 +36,7 @@ jobs:
       - name: Run Mypy
         run: |
           if [[ "${{ matrix.python-version }}" == "3.9" ]]; then
-            uv run mypy stackone_ai --exclude stackone_ai/server.py
+            uv run mypy stackone_ai --exclude stackone_ai/server.py --install-types --non-interactive
           else
-            uv run mypy stackone_ai
+            uv run mypy stackone_ai --install-types --non-interactive
           fi

pyproject.toml

@@ -116,6 +116,9 @@ warn_redundant_casts = true
 warn_unused_ignores = true
 warn_return_any = true
 warn_unreachable = true
+exclude = [
+    "^.venv/",
+]
 
 [[tool.mypy.overrides]]
 module = "bm25s"
@@ -124,3 +127,8 @@ ignore_missing_imports = true
 [[tool.mypy.overrides]]
 module = "langgraph.*"
 ignore_missing_imports = true
+
+[[tool.mypy.overrides]]
+module = "mcp.*"
+ignore_missing_imports = true
+ignore_errors = true