Verify an application-owned WebSocket ready-client recipe

Parent

The existing adapter works through a supplied socket ready client with observable lifecycle behavior.

Demonstrate acquired ready-client execution for concurrent unary requests and both stream views.
Verify abort/finalization, independent interruptions, reconnect ownership, and cancellation-before-disposal ordering.
State whether server cancellation was actually observed rather than inferring it solely from local abort forwarding.
Use existing real-protocol tests, public factories, and platform resources under the strict dependency policy.
Add no package-owned socket client, provider, or new showcase application.