eta-api elektron elektron-sdk rrt refinitiv-realtime elektron-transport-api java rssl c++ rcc-api source-directory connection trep symbology batch ssl reactor log-in api refinitiv-real-time rics fields c market-by-price linux non-interactive-provider consumer rcc rdm Service eikon market-feed callback token status DACS elektron-data-dictionary ADS api-limits constituents volume service-id trade pricing refinitiv-realtime-optimised dispatch documentation quote tick-history-rest-api search rfa load-balancing compile refresh-message subscription ipa snapshot-pricing rdf sink-driven-source sequence stream-id encoding error docker performance ADH service-name events 64-bit multi-threading mrn time-stamp conflation stale chain-ric enum OMM open-source refinitiv-realtime-sdk elektron-direct-feed equities message commodities exchanges fanout contributions monitoring failover stress-test service-dictionary data-model aws build unsubscribe