Mainnet prices, decoded from the oracles that actually write them

lidapters can now decode mainnet Blend prices. On mainnet the pools’ configured oracles are view-only aggregators that have never written a price to the ledger; the real prices live in Reflector feed contracts, published every 300 seconds under different key schemes and decimals.

• Reflector feed decoder (protocol versions 1 and 2) reading the real on-ledger price writes.
• Aggregator configuration resolved from each pool’s named oracle.
• Fixtures pinned to twelve real mainnet ledgers.

Without this, a mainnet fold completes healthily and produces no prices at all, a failure with no error signature.