v0.43.0

Changelog

• e83a6fd docs(site): landing overhaul — hero card, section rhythm, honest bench cite
• 0243e67 feat(bench): core-profile run validates I01 — schema tax collapsed
• d1d780f feat(bench): hermetic api-key run — the honest reference numbers
• b37d0d7 feat(bench): record auth_mode in summaries and the table banner
• f631dde feat: add MCP tool profiles (core|full)