Initial commit: Voice Assistant Gateway mit Konfig-/Routing-Fundament

- FastAPI-Gateway mit REST-Endpunkten (chat/speak/transcribe/devices/sessions/config)
- Geschichtete Konfiguration mit Profilen (local-dev/hybrid/cloud) via TOML + ENV
- Registry-Pattern + einheitliche Route-Aufloesung (Default->Profil->ENV->Session->Request)
- Device Router (strikt, Singleton) und Output-Lifecycle im Orchestrator
- OpenRouter-Adapter (STT multipart/LLM/TTS) + lokale Provider-Stubs
- Regelbasierte Pipeline (Cleaner/Spoken-Adapter/TTS-Normalizer)
- 22 automatisierte Tests; Doku: README, BEDIENUNGSANLEITUNG, Architektur
- Secrets ausschliesslich ueber Umgebung; .env und lokale config gitignored

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/audio/endpoints/output/base.py

@@ -0,0 +1,20 @@
+from abc import ABC, abstractmethod
+from app.schemas import AudioChunk, EndpointCapabilities
+
+class AudioOutputEndpoint(ABC):
+    endpoint_id: str
+
+    @abstractmethod
+    async def capabilities(self) -> EndpointCapabilities: ...
+
+    @abstractmethod
+    async def open(self) -> None: ...
+
+    @abstractmethod
+    async def write_chunk(self, chunk: AudioChunk) -> None: ...
+
+    @abstractmethod
+    async def flush(self) -> None: ...
+
+    @abstractmethod
+    async def close(self) -> None: ...

app/audio/endpoints/output/bluetooth.py

@@ -0,0 +1,26 @@
+from app.audio.endpoints.output.base import AudioOutputEndpoint
+from app.schemas import AudioChunk, EndpointCapabilities
+
+class BluetoothOutput(AudioOutputEndpoint):
+    endpoint_id = "bt-speaker-01"
+
+    async def capabilities(self) -> EndpointCapabilities:
+        return EndpointCapabilities(
+            id=self.endpoint_id,
+            kind="bluetooth",
+            direction="output",
+            latency_class="medium",
+            bluetooth=True,
+        )
+
+    async def open(self) -> None:
+        return None
+
+    async def write_chunk(self, chunk: AudioChunk) -> None:
+        return None
+
+    async def flush(self) -> None:
+        return None
+
+    async def close(self) -> None:
+        return None

app/audio/endpoints/output/local_default.py

@@ -0,0 +1,26 @@
+from app.audio.endpoints.output.base import AudioOutputEndpoint
+from app.schemas import AudioChunk, EndpointCapabilities
+
+class LocalDefaultOutput(AudioOutputEndpoint):
+    endpoint_id = "local-default-speaker"
+
+    async def capabilities(self) -> EndpointCapabilities:
+        return EndpointCapabilities(
+            id=self.endpoint_id,
+            kind="local-default",
+            direction="output",
+            latency_class="low",
+            default=True,
+        )
+
+    async def open(self) -> None:
+        return None
+
+    async def write_chunk(self, chunk: AudioChunk) -> None:
+        return None
+
+    async def flush(self) -> None:
+        return None
+
+    async def close(self) -> None:
+        return None

app/audio/endpoints/output/loopback.py

@@ -0,0 +1,28 @@
+from app.audio.endpoints.output.base import AudioOutputEndpoint
+from app.schemas import AudioChunk, EndpointCapabilities
+
+class LoopbackOutput(AudioOutputEndpoint):
+    endpoint_id = "loopback-output"
+
+    def __init__(self):
+        self.chunks = []
+
+    async def capabilities(self) -> EndpointCapabilities:
+        return EndpointCapabilities(
+            id=self.endpoint_id,
+            kind="loopback",
+            direction="output",
+            latency_class="low",
+        )
+
+    async def open(self) -> None:
+        return None
+
+    async def write_chunk(self, chunk: AudioChunk) -> None:
+        self.chunks.append(chunk)
+
+    async def flush(self) -> None:
+        return None
+
+    async def close(self) -> None:
+        return None

app/audio/endpoints/output/mobile_webrtc.py

@@ -0,0 +1,27 @@
+from app.audio.endpoints.output.base import AudioOutputEndpoint
+from app.schemas import AudioChunk, EndpointCapabilities
+
+class MobileWebRTCOutput(AudioOutputEndpoint):
+    endpoint_id = "mobile-webrtc-client"
+
+    async def capabilities(self) -> EndpointCapabilities:
+        return EndpointCapabilities(
+            id=self.endpoint_id,
+            kind="mobile-webrtc",
+            direction="output",
+            latency_class="low",
+            networked=True,
+            mobile=True,
+        )
+
+    async def open(self) -> None:
+        return None
+
+    async def write_chunk(self, chunk: AudioChunk) -> None:
+        return None
+
+    async def flush(self) -> None:
+        return None
+
+    async def close(self) -> None:
+        return None

app/audio/endpoints/output/mobile_ws.py

@@ -0,0 +1,27 @@
+from app.audio.endpoints.output.base import AudioOutputEndpoint
+from app.schemas import AudioChunk, EndpointCapabilities
+
+class MobileWebSocketOutput(AudioOutputEndpoint):
+    endpoint_id = "mobile-ws-client"
+
+    async def capabilities(self) -> EndpointCapabilities:
+        return EndpointCapabilities(
+            id=self.endpoint_id,
+            kind="mobile-ws",
+            direction="output",
+            latency_class="medium",
+            networked=True,
+            mobile=True,
+        )
+
+    async def open(self) -> None:
+        return None
+
+    async def write_chunk(self, chunk: AudioChunk) -> None:
+        return None
+
+    async def flush(self) -> None:
+        return None
+
+    async def close(self) -> None:
+        return None