2026-05-21 10:39:19.173 debug: [TTS GET] streaming start (lang=zh, 42 chars)
2026-05-21 10:39:19.486 debug: [TTS GET] Fish Audio first-byte: 312ms
2026-05-21 10:39:28.270 debug: [TTS GET] streaming start (lang=zh, 97 chars)
2026-05-21 10:39:28.673 debug: [TTS GET] Fish Audio first-byte: 402ms
2026-05-21 10:39:45.392 debug: [TTS GET] streaming start (lang=zh, 80 chars)
2026-05-21 10:39:45.849 debug: [TTS GET] Fish Audio first-byte: 457ms