Synchronize repository with Athena deployment

platform/hermes/config.yaml

@@ -144,13 +144,12 @@ stt:
     model: "base"
     language: "de"
 
-# Reuse Athena's OpenAI-compatible TTS route. It currently serves XTTS v2 with
-# Annmarie Nele and transparently falls back to Piper when XTTS is unavailable.
+# Reuse Athena's OpenAI-compatible Qwen3-TTS route.
 tts:
   provider: "openai"
   speed: 1.0
   openai:
-    model: "piper"
+    model: "qwen3-tts"
     voice: "alloy"
     speed: 1.0
     base_url: "http://router:8081/v1"