[Feature] re_cache: Improve hyperscan loading log messages

[Feature] re_cache: Improve hyperscan loading log messages

- Show regexp count alongside class count (e.g., "4662 regexps (42/42 classes)")
- Display loaded/total classes ratio for partial loads (e.g., "38/42 classes")
- Log missing classes with reasons (not cached, empty data, load failed)
- Add consistent logging to async loading path
- Include class type and type_data in missing class messages for easier debugging