feat: update AI voice settings for improved responsiveness and pacing

deployment/aimaq.env.production

@@ -39,10 +39,10 @@ AI_VOICE_MEDIA_IDLE_TIMEOUT_SECONDS=15
 AI_VOICE_GREETING_BARGE_IN_TRIGGER_MS=350
 AI_VOICE_V2_ENABLED=1
 AI_VOICE_V2_QUEUE_CODES=ivr_aimaq_ai_ru
-AI_VOICE_V2_ACK_MODE=disabled
+AI_VOICE_V2_ACK_MODE=immediate_short
 AI_VOICE_V2_DUPLEX_ENABLED=1
 AI_VOICE_V2_PARTIAL_ASR=1
-AI_VOICE_V2_PREBAKED_ACK_ENABLED=0
+AI_VOICE_V2_PREBAKED_ACK_ENABLED=1
 AI_VOICE_V2_EMOTIVE_ACK_ENABLED=0
 AI_VOICE_V2_EMOTIVE_ACK_RU_ONLY=1
 AI_VOICE_V2_STREAMING_TTS=1
@@ -60,9 +60,6 @@ AI_VOICE_VAD_MIN_SPEECH_MS=300
 AI_VOICE_VAD_TRAILING_SILENCE_MS=500
 
 AI_VOICE_NO_SPEECH_REPROMPT_ENABLED=1
-AI_VOICE_NO_SPEECH_REPROMPT_SECONDS=7
-AI_VOICE_NO_SPEECH_REPROMPT_LOW_SIGNAL_TURNS=2
-AI_VOICE_NO_SPEECH_REPROMPT_MAX_ATTEMPTS=2
 
 AI_VOICE_ASR_PROVIDER=elevenlabs
 AI_VOICE_ASR_MODEL=gpt-4o-transcribe
@@ -85,13 +82,12 @@ AI_VOICE_TTS_CACHE_ENABLED=1
 AI_VOICE_TTS_CACHE_DIR=/app/.data_local/ai_voice_tts_cache
 AI_VOICE_TTS_ELEVENLABS_API_KEY=sk_eb9bd36750e2a7fb378259b7144e978a044cfb412e6a2ac9
 AI_VOICE_TTS_ELEVENLABS_API_BASE=https://api.elevenlabs.io
-AI_VOICE_TTS_ELEVENLABS_MODEL_ID=eleven_turbo_v2_5
+AI_VOICE_TTS_ELEVENLABS_MODEL_ID=eleven_multilingual_v2
 AI_VOICE_TTS_ELEVENLABS_RU_VOICE_ID=4O1sYUnmtThcBoSBrri7
 AI_VOICE_TTS_ELEVENLABS_RU_LANGUAGE_CODE=ru
 AI_VOICE_TTS_ELEVENLABS_KK_VOICE_ID=4O1sYUnmtThcBoSBrri7
 AI_VOICE_TTS_ELEVENLABS_KK_LANGUAGE_CODE=kk
 AI_VOICE_TTS_ELEVENLABS_OUTPUT_FORMAT=pcm_16000
-AI_VOICE_TTS_STREAM_PREBUFFER_MS=200
 AI_VOICE_TTS_YANDEX_API_KEY=AQWJUMiUaXmbegxN4kgvM2XIlNqAPoBR5Wtq-40
 AI_VOICE_TTS_YANDEX_FOLDER_ID=ao7hkif5pvc7vfnmbl0d