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

pyproject.toml

@@ -51,15 +51,19 @@ dev = [
 ]
 voice-client = [
     "httpx>=0.28.0",
+    "loguru>=0.7.3",
     "numpy>=2.0.0",
     "PySide6>=6.8.0",
     "sounddevice>=0.5.0",
+    "websocket-client>=1.8.0",
 ]
 voice-client-build = [
     "httpx>=0.28.0",
+    "loguru>=0.7.3",
     "numpy>=2.0.0",
     "PySide6>=6.8.0",
     "sounddevice>=0.5.0",
+    "websocket-client>=1.8.0",
     "pyinstaller>=6.0.0",
 ]