Module realtime

@honua/sdk-js/realtime — realtime transport adapters. Raw Server-Sent Events (sse.ts) and WebSocket (websocket.ts) wire adapters pair with the bounded, resumable wrapper in resumable-transport.ts (issue #557), which adds the #556 delivery gate, reconnect/backoff, heartbeat timeout, and redacted telemetry on top of either one. odata-delta.ts (issue #558) adds a pull-based OData v4 delta-link adapter with its own bounded poll loop and honest, non-live freshness reporting — it satisfies the same RealtimeFeatureTransport surface but is not a socket transport, so it does not compose with resumable-transport.ts's reconnect wrapper.