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