* Unified NetBird combined server (Management, Signal, Relay, STUN) as a single executable with richer YAML configuration, validation, and defaults.
* Official Dockerfile/image for single-container deployment.
* Optional in-process profiling endpoint for diagnostics.
* Multiplexing to route HTTP/gRPC/WebSocket traffic via one port; runtime hooks to inject custom handlers.
* **Chores**
* Updated deployment scripts, compose files, and reverse-proxy templates to target the combined server; added example configs and getting-started updates.
With this change we should be able to collect and expose the following histograms:
* `management.updatechannel.create.duration.ms` with `closed` boolean label
* `management.updatechannel.create.duration.micro` with `closed` boolean label
* `management.updatechannel.close.one.duration.ms`
* `management.updatechannel.close.one.duration.micro`
* `management.updatechannel.close.multiple.duration.ms`
* `management.updatechannel.close.multiple.duration.micro`
* `management.updatechannel.close.multiple.channels`
* `management.updatechannel.send.duration.ms` with `found` and `dropped` boolean labels
* `management.updatechannel.send.duration.micro` with `found` and `dropped` boolean labels
* `management.updatechannel.get.all.duration.ms`
* `management.updatechannel.get.all.duration.micro`
* `management.updatechannel.get.all.peers`
