general/ci: clean up mypy-misc pipeline, only exclude specific files instead

marked some module configs which aren't really ready for public use as type: ignore

my/coding/codeforces.py

@@ -1,11 +1,13 @@
 #!/usr/bin/env python3
-from my.config import codeforces as config
+from my.config import codeforces as config  # type: ignore[attr-defined]
+
 
 from datetime import datetime, timezone
 from typing import NamedTuple
 import json
 from typing import Dict, Iterator
 
+
 from ..core import get_files, Res, unwrap
 from ..core.compat import cached_property
 from ..core.konsume import ignore, wrap