[Feature Request]: Add an option to auto-delete stale nodes (inactive for x days)

[JurajKubrican]

Platform

Cross-Platform

Description

This relates to #5282 node db full

I believe a node can actually benefit from having a smaller node db.

On initial connection to the node, all nodes are being sent over a connection that can be slow/unreliable. this can lead to a slow / frustrating experience.

I believe adding an option to auto delete nodes that have not been heard for x days default week might improve the overall experience.

A similar feature has been added to the MeshSense SW which allows you to delete inactive nodes.

[b8b8]

Wouldn't that force re-exchanging keys unnecessarily when they come back into range and force rediscovery of nodes on the map that you would slowly lose the position of? The nodes are only passed on to the phone at initial connection, and while it takes a little time (a few seconds), I wouldn't say it is unreliable.

[thebentern]

It introduces its own set of confusing issues and edge cases too... As a hypothetical, if I start up a device after months of inactivity, a TTL expiration for nodes in my NodeDB could cause all of my nodes to disappear.

[garthvh]

You can already exclude the node db when connecting and there is an issue for a node only call #4564