Parse an ISO-8601 date-time to a Date. A string carrying an explicit zone (Z/offset) parses exactly;
a ZONELESS string is interpreted as UTC (NOT the server's local timezone), so a sync watermark is
deterministic and timezone-stable regardless of where the API server runs. Returns null for a non-ISO
or unparseable value.
Parse an ISO-8601 date-time to a
Date. A string carrying an explicit zone (Z/offset) parses exactly; a ZONELESS string is interpreted as UTC (NOT the server's local timezone), so a sync watermark is deterministic and timezone-stable regardless of where the API server runs. Returnsnullfor a non-ISO or unparseable value.