v0.2.0

Changelog

• a94a0fa Add bench drive and record the end-to-end shadow run
• d4b5af2 Add data auto-detection, Claude token calibration and trimproof report
• 72bb1ec Add launch write-up, contributing and security docs
• d8a1109 Harden the gateway and make token counting fast
• 299eece Promote routes with a three-arm paired non-inferiority test