feat: 站点 JSON、语音终端 WebSocket 指派与客户端联调

- 用 OR_SITE_CONFIG_JSON_FILE 统一术间配置（video_rtsp_urls + voice_or_room_bindings）
- VoiceTerminalHub：assignment、WS 推送与 HTTP 查询；开录/停录后 notify
- 一键联调 orchestrate-and-start 与 /client/surgeries/start 共用指派逻辑，修复 demo 路径不发 WS
- 语音桌面端：SIGINT 退出、shutdown 清理、仅 WS 指派、固定 pending 轮询间隔、界面仅保留录音时长
- 新增/调整契约与绑定测试，文档与示例配置同步

Made-with: Cursor

app/dependencies.py

@@ -25,6 +25,7 @@ from app.services.surgery_pipeline import SurgeryPipeline
 from app.services.video.hikvision_runtime import HikvisionRuntime
 from app.services.video.session_manager import CameraSessionManager
 from app.services.voice_resolution import VoiceConfirmationService
+from app.services.voice_terminal_hub import VoiceTerminalHub
 
 
 @dataclass
@@ -42,6 +43,7 @@ class AppContainer:
     tear_segment_model_bundle: TearGatedSegmentModelBundle | None
     voice_confirmation_service: VoiceConfirmationService
     surgery_pipeline: SurgeryPipeline
+    voice_terminal_hub: VoiceTerminalHub
 
     async def start(self) -> None:
         await self.camera_session_manager.start_archive_retry_loop()
@@ -96,6 +98,7 @@ def build_container(
         voice_confirmation=voice,
         session_factory=sf,
     )
+    voice_hub = VoiceTerminalHub(s)
     return AppContainer(
         settings=s,
         consumable_vision_algorithm_service=vision,
@@ -108,6 +111,7 @@ def build_container(
         tear_segment_model_bundle=tear_bundle,
         voice_confirmation_service=voice,
         surgery_pipeline=pipeline,
+        voice_terminal_hub=voice_hub,
     )
 
 
@@ -140,3 +144,7 @@ def get_surgery_result_repository(request: Request) -> SurgeryResultRepository:
 
 def get_voice_confirmation_service(request: Request) -> VoiceConfirmationService:
     return get_container(request).voice_confirmation_service
+
+
+def get_voice_terminal_hub(request: Request) -> VoiceTerminalHub:
+    return get_container(request).voice_terminal_hub