[JENKINS-76213] Add metrics of the forensics plugin

[jenkins-infra-bot]

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Originally reported by drulli, imported from: Add metrics of the forensics plugin

• assignee: xincix
• status: Open
• priority: Minor
• component(s): forensics-api-plugin
• resolution: Unresolved
• votes: 0
• watchers: 1
• imported: 20260107-220949