- Updated server to send status_ok messages with data field instead of direct timestamp
- Modified voicebot _send_message to always include data field (empty dict if no data)
- Fixed all error message formats in server to use proper {type, data: {error}} structure
- Updated client join message to include empty data field for consistency
- All WebSocket messages now comply with WebSocketMessageModel requiring data field
- Resolved Pydantic validation errors for status_ok and error messages
