Status Tracking

The library distinguishes between initial loading and background refetching so your UI never flashes a loading spinner when stale data is available:

Scenario	:status	:fetching?	:data
Initial load (no data)	:loading	true	nil
Background refetch (stale data)	:success	true	previous data
Idle, fresh data	:success	false	current data
Failed fetch	:error	false	previous data or nil
Retry after error	:loading	true	previous data or nil

Use :status for data state (what to render) and :fetching? for network state (show a subtle spinner).