nat: fix async_upnp_client compatibility — traverse embedded devices, fix bool type, deduplicate

- Guard on_response with early return if _service already found (SSDP
  sends one response per device sub-type, so the callback fires ~9x)
- Extract location from CaseInsensitiveDict headers (newer
  async_upnp_client passes headers dict, not a response object)
- Recursively traverse embedded_devices to find WANIPConnection service
  (root device only exposes Layer3Forwarding; WANIPConnection lives in
  the InternetGatewayDevice → WANDevice → WANConnectionDevice subtree)
- Pass NewEnabled=True (bool) instead of 1; async_upnp_client validates
  the UPnP boolean type strictly

Author: ping-ke

quarkchain/p2p/nat.py

@@ -114,10 +114,21 @@ async def _discover(self, session):
         factory = UpnpFactory(requester)
 
         async def on_response(response):
+            if self._service:
+                return
+            # async_upnp_client passes headers as a CaseInsensitiveDict
+            location = response.get("location") if hasattr(response, "get") else getattr(response, "location", None)
+            if not location:
+                return
             try:
-                device = await factory.async_create_device(response.location)
+                device = await factory.async_create_device(location)
 
-                for service in device.services.values():
+                def _iter_services(dev):
+                    yield from dev.services.values()
+                    for sub in getattr(dev, "embedded_devices", {}).values():
+                        yield from _iter_services(sub)
+
+                for service in _iter_services(device):
                     if "WANIPConn" in service.service_type:
                         self._service = service
                         self.logger.info("Found UPnP WANIP service")
@@ -149,7 +160,7 @@ async def _add_port_mapping(self) -> None:
                         NewProtocol=protocol,
                         NewInternalPort=self.port,
                         NewInternalClient=internal_ip,
-                        NewEnabled=1,
+                        NewEnabled=True,
                         NewPortMappingDescription=description,
                         NewLeaseDuration=self._nat_portmap_lifetime,
                     )