DxFeed connections keep their real token lifetime

DxFeed connections under Import were sometimes marked Expired and asked for Reconnect even though Volumetrica still accepted the session. RICO TRADING had been applying a locally guessed 12-hour expiry to opaque tokens.

New connections now authenticate against Volumetrica's documented v2 API, store the provider-supplied expiration, and reuse the dedicated report token for sync. Existing connections that were saved with the old guessed timestamp stay active until DxFeed returns a real authorization failure. JWT expiry and explicit 401/403 responses still mark a connection expired when the provider actually rejects it.

If you sync evaluation accounts through DxFeed, you should see fewer unnecessary daily reconnect prompts and more reliable automatic sync eligibility.