obsi_flutter 1.0.0

Production Flutter error capture and Navigator telemetry for Obsi.

1.0.0

• Added production Navigator push, pop, replace, remove, top-route, and gesture observation with spans, metrics, structured logs, error breadcrumbs, privacy controls, nested navigator identity, filtering, and failure isolation.
• Added Android and iOS integration test host.
• Added guarded Flutter framework and root-isolate error capture, consolidating Flutter integrations into one package.