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