Add duoUsedCount metric to AI Impact dashboard (!207562) · Merge requests · GitLab.org / GitLab · GitLab

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What does this MR do and why?

Adds the `duoUsedCount` metric to the Duo usage metrics table in the AI Impact dashboard.

Screenshots

MR acceptance checklist

Add the duoUsedCount metric to the duo usage table
Update relevant tests
Update related docs

Related to #572734

Edited Oct 15, 2025 by Ezekiel Kigbo