trep infrastructure elektron refinitiv-realtime ADH ADS rfa rmds-test-client ATS rics sink-driven-source DACS non-interactive-provider rest-api OMM elektron-sdk data caching open-dacs elektron-data-dictionary sfc authentication disconnection eikon rcc-api latency fields update-message ping rrcp-dump status delayed-feed watchlist market-feed openssl chain-ric error etf batch symbology issue mifid ssl java private-streams posting rrcp xml contributions pricing c# publishing websockets oracle rfa-api page mrn screening enum compression api app parameters connection-error sdk rcc source-directory reports packet-loss rkd-api rssl r ema-api mount multicast soap-api web-services