Add device group audit loggers

[Steve-Mcl]

Description

Adds 4 new audit log events to the application audit log

• application.deviceGroup.created
• application.deviceGroup.updated
• application.deviceGroup.deleted
• application.deviceGroup.members.changed

Related Issue(s)

#2997

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on FlowFuse/helm to update ConfigMap Template
  • Issue/PR raised on FlowFuse/CloudProject to update values for Staging/Production

Labels

• Backport needed? -> add the backport label
• Includes a DB migration? -> add the area:migration label

[Steve-Mcl]

Note for reviewer:

The Devices membership changed entry info only states "Added x" and "Removed y" since listing out the name of every device added or removed to the log would (in cases of larger users) present a pretty poor view in the audit log.

Happy to be advised otherwise.

[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (c29af2d) 40.66% compared to head (8af208d) 40.76%.

Files	Patch %	Lines
...end/src/components/audit-log/AuditEntryVerbose.vue	0.00%	8 Missing ⚠️

Additional details and impacted files

@@                      Coverage Diff                       @@
##           2997-device-groups-backend    #3236      +/-   ##
==============================================================
+ Coverage                       40.66%   40.76%   +0.10%     
==============================================================
  Files                             603      603              
  Lines                           22464    22515      +51     
  Branches                         5425     5441      +16     
==============================================================
+ Hits                             9135     9179      +44     
- Misses                          13329    13336       +7     

Flag	Coverage Δ
backend	77.54% <100.00%> (+0.09%)	⬆️
frontend	2.02% <0.00%> (-0.01%)	⬇️

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[Steve-Mcl]

@Pezmc conflict resolved in 8af208d

Please cast a final eye and merge if/when tests pass and you are happy.