refactor: move estado da sessão para o domínio

src/voice_assistant/audio_gateway/app/main.py

@@ -99,7 +99,7 @@ from voice_assistant.voice_pipeline import (
 )
 
 
-from voice_assistant.audio_gateway.app.session import SessionState
+from voice_assistant.domain.session import SessionState
 
 # logger configuration
 logger = logging.getLogger(__name__)

src/voice_assistant/domain/__init__.py

@@ -0,0 +1 @@
+"""Domain models and rules independent of transport and providers."""

src/voice_assistant/voice_pipeline.py

@@ -46,7 +46,7 @@ from contextlib import aclosing
 from voice_assistant.agent.text_chunker import TextChunker
 from voice_assistant.turn_manager import TurnState
 from voice_assistant.agent.adapter import AgentAdapter
-from voice_assistant.audio_gateway.app.session import SessionState
+from voice_assistant.domain.session import SessionState
 from voice_assistant.turn_manager import Turn, TurnManager
 from voice_assistant.tts.adapter import TTSAdapter