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 market-feed encoding callback status Service eikon DACS token ADS build linux non-interactive-provider market-by-price rdm multi-threading mrn time-stamp locking sink-driven-source stale sequence OMM docker performance equities ADH elektron-direct-feed 64-bit exchanges conflation stress-test service-dictionary chain-ric data-model enum open-source disconnection message api-limits commodities service-id fanout contributions dispatch trade monitoring quote failover documentation search aws ema-api load-balancing compile unsubscribe ipa constituents snapshot-pricing volume rdf pricing refinitiv-realtime-optimised tls tick-history-rest-api stream-id error rfa service-name refresh-message subscription events