feat(qwen-audio): add Alibaba Cloud Qwen-Audio Realtime service integration

- Introduced Qwen-Audio Realtime service for speech-to-speech processing in Pipecat.
- Updated interface catalog to include Qwen-Audio Realtime capabilities.
- Enhanced model resource testing to support new service.
- Added configuration options for audio sample rates and turn detection modes.
- Updated documentation to reflect integration details and usage instructions.

backend/services/interface_catalog.py

@@ -119,6 +119,58 @@ INTERFACE_DEFINITIONS: list[dict] = [
             ),
         ],
     },
+    {
+        "interface_type": "qwen-audio-realtime",
+        "name": "Alibaba Cloud Qwen-Audio Realtime",
+        "capability": "Realtime",
+        "fields": [
+            field(
+                "modelId",
+                "Model ID",
+                type_="select",
+                required=True,
+                default="qwen-audio-3.0-realtime-flash",
+                options=[
+                    "qwen-audio-3.0-realtime-flash",
+                    "qwen-audio-3.0-realtime-plus",
+                ],
+            ),
+            field(
+                "apiUrl",
+                "WebSocket URL (with Workspace ID)",
+                type_="url",
+                required=True,
+            ),
+            field(
+                "apiKey",
+                "API Key",
+                group="secrets",
+                type_="password",
+                required=True,
+            ),
+            field("voice", "Voice", default="longanqian"),
+            field(
+                "turnDetection",
+                "Turn Detection",
+                type_="select",
+                default="server_vad",
+                options=["server_vad", "smart_turn"],
+            ),
+            field("vadThreshold", "VAD Threshold", type_="number", default=0.5),
+            field(
+                "silenceDurationMs",
+                "VAD Silence Duration (ms)",
+                type_="number",
+                default=800,
+            ),
+            field(
+                "maxHistoryTurns",
+                "Max History Turns",
+                type_="number",
+                default=20,
+            ),
+        ],
+    },
     {
         "interface_type": "xfyun-asr",
         "name": "Xfyun Streaming ASR",