- Use std::sync::LazyLock to construct Sanitizer, Validator, and LeakDetector
once instead of on every fuzz iteration (they compile regex/Aho-Corasick)
- Remove fuzz_config_env assertion that panics on null-byte-only input
- Remove no-op length check with misleading comment in fuzz_config_env
- Update fuzz_config_env description in README to match actual behavior
Co-Authored-By: Claude Opus 4.6 <[email protected]>