RLUSD integrity: peg + on-chain supply + XRPL DEX liquidity cross-check

AgentNOMOS XRPL RLUSD Integrity Check: Cross-verifies Ripple USD (RLUSD) across three sources in one call — DeFiLlama peg price and market cap, XRPL on-chain circulating supply via gateway_balances on the issuer account, and live XRPL DEX orderbook offers. Returns per-source results, an integrity summary with sources_checked and sources_ok, and flags such as SUPPLY_MISMATCH with severity and detail. Automated data cross-check — not investment advice and not a regulatory assessment.