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