v1.20.3

• README and SKILL.md state the free tier as 10 free verifications plus 100 requests a day, list USDT-TRC20 among the credit payments, and give the Merkle proof coverage (27 of the 31 EVM chains). insumer_confirm_payment accepts exactly the chains the API accepts for it (the seven EVM payment chains and Solana, USDC only), so a Tron chain ID is refused before any request is sent, and the README states the trust proof premium as refunded whenever no proof is delivered. Tool descriptions, README and SKILL.md carry house punctuation and present-tense wording. The self-hosted HTTP runner (node build/http.js) allows 100 metered calls per UTC day unless INSUMER_DAILY_CAP is set. No tool name or output changes.