T&A: add metric to collect inconsistencies for #37759

[klees]

Hi everyone,

in todays meeting of the T&A tech squad we decided to collect known inconsistency metrics for the database that arise during investigations of mantis tickets. This is the code to do so for Mantis 37759 (i hope...).

@mbecker-databay (or someone else who feels knowledgeable enough): Please look into my query, I hope I've understand the issue and the database correctly.

Kind regards!