NIFI-12166 Add repo usage to the monitoring endpoint

[timeabarna]

Summary

NIFI-12166

Tracking

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• Apache NiFi Jira issue created

Pull Request Tracking

• Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
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Build

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  • JDK 21

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Documentation

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[timeabarna]

Thanks @markap14 for your review. I've modified the code based on your recommendations.

[markap14]

Thanks @timeabarna looks good to me. +1 will merge.