Migrate to Deepgram STT, Silero v5 TTS, and fix wake word mic handling

tts.py

@@ -1,6 +1,6 @@
 """
 Text-to-Speech module using Silero TTS.
-Generates natural Russian speech with Xenia voice.
+Generates natural Russian speech.
 Supports interruption via wake word detection using threading.
 """
 
@@ -140,10 +140,6 @@ class TextToSpeech:
             except Exception as e:
                 print(f"❌ Ошибка TTS (часть {i + 1}/{total_chunks}): {e}")
                 success = False
-                # Continue with next chunk? or break?
-                # Usually if one fails, we might want to try others, but for "too long" error
-                # splitting should solve it. If it fails for other reasons, maybe better to stop.
-                # But let's keep trying subsequent chunks in case it's a specific symbol issue.
 
         if success and not self._interrupted:
             print("✅ Воспроизведение завершено")