Introduced `_validate_command_in_argv` to check for invalid commands in CLI arguments. Updated compression level validation to include the new `-c` flag. Adjusted tests to reflect changes in error handling, ensuring argparse error codes are maintained for invalid inputs.
Updated test cases in `test_cli_missing_lines.py`, `test_core_missing_lines.py`, and `test_core_missing_lines_fixed.py` to improve readability and consistency. Changes include replacing redundant comments, simplifying code structure, and ensuring proper function usage (e.g., `_validate_files` instead of `validate_files`).
Introduced new test files to improve coverage for CLI and core functionalities. Added edge case tests for CLI commands, conftest fixtures, and core archive handling, including error handling, streaming mode, and verbose listing.
xixu-me