elektron-sdk elektron rrt eta-api elektron-transport-api java rssl trep encoding pricing refinitiv-realtime interactive-provider error stream-id upa debugging performance caching rdm upa-api DACS fields map-entry json-payload multi-threading buffer error-handling rfa ADH development RWF connection re-subscribe api-limits latency elektron-data-dictionary trade non-interactive-provider stream-state error-1006 ATS OMM bonds service-status data refinitiv-real-time document enum market-by-price channel api consumer symbology reactor onepass source-directory