chore: release v2.0.0

[ScuttleBot]

Bump BENCHMARK_VERSION to 2.0.0 for the official release.

What's Changed

This marks the official 2.0.0 release. See the release notes for full changelog since 1.2.1.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

This is a clean version bump from 2.0.0-rc12 to 2.0.0. No bugs or security concerns.

Files Reviewed (1 file)

• BENCHMARK_VERSION

---

_{Reviewed by claude-4.6-sonnet-20260217 · 57,816 tokens}