2026-05-21 10:38:41.493 debug: [TTS GET] streaming start (lang=zh, 74 chars)
2026-05-21 10:38:41.808 debug: [TTS GET] Fish Audio first-byte: 315ms
2026-05-21 10:38:55.051 debug: [TTS GET] streaming start (lang=zh, 39 chars)
2026-05-21 10:38:55.370 debug: [TTS GET] Fish Audio first-byte: 313ms
2026-05-21 10:39:04.492 debug: [TTS GET] streaming start (lang=zh, 76 chars)
2026-05-21 10:39:05.073 debug: [TTS GET] Fish Audio first-byte: 581ms