scrypted: subscribe to camera child devices (fix Unifi doorbell wake)

Unifi doorbell cameras expose the bell button as a child device of
the camera (separate nativeId, its own BinarySensor interface), not
as a property of the camera itself. The previous code did cam.listen()
on the parent camera only, so motion + person events arrived (those
fire on the camera itself) but bell-press events never reached
handleCameraEvent.

HomeKit kept working because Scrypted's HomeKit bridge auto-syncs all
child devices; our plugin was silently the only consumer missing the
event. Confirmed by the trace log in 3b0ab73 staying silent across a
bell press while motion events still printed.

Fix: in attachListener, walk systemManager.getDeviceIds() and pick
any device with providerId === cam.id as an additional listen target.
Subscribe on all of them with the same iface list — listen() no-ops
on unsupported ifaces, so we don't have to introspect each child.

Tracking changed from Map<nativeId, EventListenerRegister> to
Map<nativeId, EventListenerRegister[]> so detach/script-reload cleanup
removes every listener, not just the camera's.

0 files changed, 0 insertions, 0 deletions