feat: adiciona Silero VAD local com configuração por ambiente

src/voice_assistant/providers.py

@@ -10,7 +10,7 @@ Responsibilities:
     - Resolve provider implementations from ProviderCatalog metadata.
     - Import provider classes dynamically.
     - Validate that the loaded implementation matches the expected adapter.
-    - Instantiate STT, Agent, and TTS providers using provider-specific options.
+    - Instantiate STT, Agent, TTS, and VAD providers using provider-specific options.
 
 Non-responsibilities:
     - Loading YAML files.
@@ -26,7 +26,7 @@ Architecture:
         Provider Loader
               |
               v
-    STTAdapter / AgentAdapter / TTSAdapter
+    STTAdapter / AgentAdapter / TTSAdapter / VADAdapter
               |
               v
        concrete provider
@@ -43,12 +43,14 @@ from voice_assistant.config.models import (
 )
 from voice_assistant.stt.adapter import STTAdapter
 from voice_assistant.tts.adapter import TTSAdapter
+from voice_assistant.vad.adapter import VADAdapter
 
 
 PROVIDER_CONTRACTS: dict[str, type] = {
     "stt": STTAdapter,
     "agent": AgentAdapter,
     "tts": TTSAdapter,
+    "vad": VADAdapter,
 }
 
 
@@ -184,3 +186,19 @@ def create_tts_adapter(
         config=config.tts,
     )
 
+
+
+
+def create_vad_adapter(
+    config: AppConfig,
+    catalog: ProviderCatalog,
+) -> VADAdapter:
+    """Create the VAD selected by the active environment configuration."""
+    if config.vad is None:
+        raise ValueError("VAD provider is not configured for this environment.")
+
+    return _create_provider(
+        catalog=catalog,
+        component="vad",
+        config=config.vad,
+    )