…hetic-logging

…>runtime rename

- Fix zipapp detection to check __main__ attribute named after runtime module's __file__ path
- Update test_pytest_runtime_cache_integrity to use apathetic_utils.runtime instead of removed system module
- Remove unnecessary None check for __file__ (always a string in module context)

Add all missing public functions from mixins to __init__.py exports:
- CI: if_ci
- Modules: detect_packages_from_files, find_all_packages_under_path
- Paths: strip_common_prefix
- Runtime: find_shiv, ensure_standalone_script_up_to_date, ensure_zipapp_up_to_date, runtime_swap
- Subprocess: run_with_output, run_with_separated_output
- Testing: create_mock_superclass_test, patch_everywhere

All functions are now accessible via the namespace class and included in __all__.

- Replace null-byte command serialization with JSON to avoid embedded null byte errors
- Fix wrapper script to exec Python scripts in same process after modifying sys.__stdout__
- Remove pytest.skip() markers from 5 tests that were incorrectly skipped
- All tests now pass; only debug test remains skipped as intended