- Updated the WebSocket API reference to improve clarity by removing unnecessary headings and emphasizing message types.
- Revised the index.md to specify 'chroma' as the knowledge base, enhancing the overview of the platform's architecture.
- Introduced `output.audio.played` message type for client acknowledgment of audio playback completion.
- Updated `DuplexPipeline` to track client playback state and handle playback completion events.
- Enhanced session handling to route `output.audio.played` messages to the pipeline.
- Revised API documentation to include details about the new message type and its fields.
- Updated schema documentation to reflect the addition of `output.audio.played` in the message flow.
