Bump the default provider_concurrency claude-code 1 -> 3 so all three claude
models run concurrently (each already runs its 5 lenses at once). Peak is now
3 x 5 = 15 concurrent claude -p per pass. Claude was the wall-clock bottleneck
running serially; subscription is expected to handle the concurrency.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>