flushPendingOperations method
Forces an immediate drain attempt of the offline queue instead of waiting for the next reconnect.
The queue already drains automatically on every connection (including the very first one after a cold start) — call this only for an on-demand retry, e.g. a manual "retry sending" affordance. A no-op on clients without an offline queue configured.
Implementation
@override
Future<void> flushPendingOperations() async {}