pi-synthetic: v0.31.1

Patch Changes

• 7f7acb7: Add hf:moonshotai/Kimi-K3.1-Pro with text/image input, 524K context, 65K output tokens, and $2/M input, $10/M output, and $0.20/M cache-read pricing. Expose minimal through max reasoning levels and hide off because reasoning_effort: "none" does not disable reasoning.