4e31f8c61b
- New word_timestamps option (default False) in client handshake - When enabled, each segment includes 'words' array with per-word start/end times and probability scores - Wired through entire pipeline: client → server → backend → transcribe() - Words include timestamp_offset for accurate absolute times - REST API already supported word timestamps; now WebSocket does too - Added 9 unit tests for word timestamp extraction and formatting