v0.12.7

What's Changed

• perf(jit): reduce native entry, feedback, and PC validation overhead by @huacnlee in #18
• perf(jit): reuse native timing storage and settle Tier 2 benchmarks by @huacnlee in #19
• perf(jit): consolidate feedback and tier-state lookups by @huacnlee in #20
• docs(perf): compare main engines and set next optimization targets by @huacnlee in #21

Full Changelog: v0.12.6...v0.12.7