chore(ci): move pytest from pre-commit to pre-push hook

[Alberto-Codes]

Summary

pytest runs the full test suite on every git commit via pre-commit. This slows down the commit loop unnecessarily — linting and formatting catch most issues instantly, and tests can gate on push instead.

Change

Move the pytest hook from default_install_hook_types (pre-commit) to pre-push stage in .pre-commit-config.yaml:

      - id: pytest
        name: pytest
        entry: uv run pytest --tb=short -q
        language: system
        types: [python]
        pass_filenames: false
        stages: [pre-push]

After updating the config, re-install hooks:

pre-commit install --hook-type pre-push

Why

• Commits stay fast (linting, formatting, type checks — seconds)
• Tests still run before code reaches the remote
• CI is the final safety net regardless