v3.1.1

What's Changed

• feat: add JMH benchmarks module + BENCHMARKS.md by @jlc488 in #11
• docs: surface JMH benchmark results in README + docs site by @jlc488 in #12
• Fix uppercase-scheme bypass in LLM tool-input guard by @jlc488 in #13
• Prepare 3.1.1 release by @jlc488 in #14

Full Changelog: v3.1.0...v3.1.1