Add audit module

[j-rafique]

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[roomote]

Rooviewer   See task on Roo Cloud

Re-reviewed the audit module implementation. The previous issue has been addressed.

• supernode/audit/service.go: The break in the result collection loop only exits the select, not the for loop. Consider using a labeled break or goto for clearer intent. Fixed with labeled break.

Previous reviews

• b44f9e0: Review #1

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}