Function sanitize_for_pattern_matching 

pub fn sanitize_for_pattern_matching(command: &str) -> Cow<'_, str>

Create a sanitized view of command for regex-based pattern matching.

This function replaces known-safe string arguments (commit messages, issue descriptions, grep patterns, etc.) so dangerous substrings inside those arguments don’t trigger false-positive blocks.

The sanitizer is intentionally conservative:

• It only strips arguments in the explicit SAFE_STRING_REGISTRY.
• It never strips any token that appears to contain shell-executed constructs like $( or backticks (even if the flag/command is otherwise safe).

This is designed to be be used on the hot path, so it returns a borrowed view when no sanitization is required.