feat: add Agent and firmware metadata to user configuration

[ert78gb]

related story UltimateHackingKeyboard/firmware#1384

[mondalaci]

@kareltucek Please review this one.

[kareltucek]

I am wondering whether last Agent-side save is actually the useful information - rather than say the version that performed the last migration.

Also, thinking about it, firmware isn't interested in these data, so I should have introduced simply a dynamic-length byte blob instead, so that Robi could save whatever info he finds useful.

Anyways, looks good to me -> feel free to merge.

[ert78gb]

I am wondering whether last Agent-side save is actually the useful information - rather than say the version that performed the last migration.

I thought Agent side error cloud screw up the config too.

Also, thinking about it, firmware isn't interested in these data, so I should have introduced simply a dynamic-length byte blob instead, so that Robi could save whatever info he finds useful.

Now we have 2 blob :) I am fine with these 2 info. I hope it will help in the investigations.

[kareltucek]

I meant last save vs last migration, not agent vs firmware :-).

(Firmware fell out of that be ause it does not do migrations.)

[kareltucek]

Now we have 2 blob :)

Indeed! :)