The discovery looks like it might be another way to track devices (besides all the usual ways). One of the fingerprints is the `fingerprint` attribute. The protocol spec is unclear whether and when that can be recycled:

https://github.com/localsend/protocol#2-fingerprint-%E6%8C%8...

> The fingerprint is used to avoid self-discovery and to remember devices.

https://github.com/localsend/protocol#31-multicast-udp-defau...

> The fingerprint is only used to avoid self-discovering.