The 'flag keeps drift optimistic + queues mutation on server failure'
case trips a StreamProvider<bool> lifecycle issue when the async catch
path's awaited MutationQueue.enqueue → unawaited drain() chain reads
connectivityProvider.future. The other 3 quarantine tests pass with
the same _container helper (incl. the never-closing connectivity
override); only the throw variant surfaces this. Full diagnostic and
suggested next investigations are in Fable #476.
Closes#399's drift-re-enable scope: 11/11 originally-scoped tests
(4 sync_controller + 5 audio_cache + 2 storage_section) pass on the
libsqlite3-bearing ci-flutter:3.44 image, plus 3/4 quarantine tests
and the widgets_smoke suite.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen
b93b116e4f