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ExchangeProfile: standardized exchange metadata (fees, latency, capabilities). 3 pre-defined exchanges: Binance, BingX, Bybit. AssetProfile.exchanges: tuple[str] — which venues trade each asset. New query functions: get_assets_on_exchange, get_common_assets, get_exchange_for_asset, get_exchange, list_exchanges. _DATA_STORAGE_SCHEMA_FORMATS.md: comprehensive reference for agent consumption — data model, storage format, query interfaces, data flow diagram, enum reference, import patterns for BLUE/VIOLET/UV integration. README updated: exchange registry section, package structure, subsystems table.