feat(realtime): expose queue status and position events

[AdirAmsalem]

Summary

• Reapply queue-status support from PR lucy demo sdk  #71 on top of current main realtime architecture.
• Add websocket status and queue_position message handling through WebRTC connection and realtime client events.
• Expose optional onStatus and onQueuePosition connect callbacks, and add unit tests covering both event and callback flows.

Validation

• pnpm format
• pnpm test tests/unit.test.ts
• pnpm typecheck
• pnpm build

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Note

Low Risk
Additive event/callback plumbing and type updates with unit coverage; low risk aside from potential minor compatibility impact for consumers relying on strict event typings.

Overview
Surfaces server queue updates end-to-end in realtime mode by adding websocket message types for status and queue_position, wiring them through WebRTCConnection’s emitter, and exposing them from RealTimeClient as new status and queuePosition events.

connect() now accepts optional onStatus and onQueuePosition callbacks (validated via zod) that fire alongside event emission, and unit tests were added to cover both the event-based and callback-based flows.

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commit: 7af30d7