ProtocolWebSocketTransportAdapter

Transport adapter that speaks the thread-centric protocol over a bidirectional WebSocket. Bound to a threadId at construction or later via setThreadId — the socket connects to ws://.../threads/:thread_id/stream/events.

On unexpected disconnect the adapter reconnects with exponential backoff (see ProtocolWebSocketTransportOptions.maxReconnectAttempts). The server replays buffered events on the new socket; the SDK deduplicates by event_id. ProtocolWebSocketTransportOptions.onReconnected runs after each successful reconnect so ThreadStream can re-issue subscription.subscribe commands.