Adds collection and display of chronyc serverstats output to the generated HTML report.

[trcjr]

This adds serverstats collection and rendering alongside existing chrony diagnostics, improving troubleshooting and observability without changing runtime behavior.

[TheHuman00]

Thanks again for this PR really appreciate the contribution 👍

I took a closer look at what serverstats adds in practice. For example, here’s a typical output:

NTP packets received       : 3369642868
NTP packets dropped        : 0
Command packets received   : 88568
Command packets dropped    : 0
Client log records dropped : 2345527641
NTS-KE connections accepted: 4209
NTS-KE connections dropped : 0
Authenticated NTP packets  : 29
Interleaved NTP packets    : 2186556
######  This part is already in the graph chrony_serverstats

NTP timestamps held        : 4096
NTP timestamp span         : 1752
NTP daemon RX timestamps   : 0
NTP daemon TX timestamps   : 3367269691
NTP kernel RX timestamps   : 3369456195
NTP kernel TX timestamps   : 2186504
NTP hardware RX timestamps : 0
NTP hardware TX timestamps : 0

For the second part, I’m totally fine with adding it. But I’m wondering if it wouldn’t make more sense to just include this second section of the output instead of the whole thing.

Do you think this part is the one that actually brings meaningful information for users?

If yes, then we can think about how best to integrate it, whether it should be enabled by default or kept optional (by the config part above the script) ?

Let me know what you think 🙂