Dignified Python 313

@dagster-io/workstack-dignified-python

This skill should be used when editing Python code in the workstack codebase. Use when writing, reviewing, or refactoring Python to ensure adherence to LBYL exception handling patterns, Python 3.13+ type syntax (list[str], str | None), pathlib operations, ABC-based interfaces, absolute imports, and explicit error boundaries at CLI level. Essential for maintaining workstack's dignified Python standards.