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## Summary Bumps `langgraph-sdk` `0.3.15` → `0.4.0`. Minor bump to reflect the v3 streaming public API that landed since 0.3.15: - `client.threads.stream(...)` — new thread-centric streaming entry point (async + sync) - SSE and WebSocket transports (`ProtocolSseTransport`, `ProtocolWebSocketTransport`) with reconnect handling and stream selection - Shared stream subscriptions, lifecycle / interrupts state, output / values projections, messages / tool-call projections, scoped subgraph handles, thread stream helpers