Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

The previous metrics refactor accidentally recomputed the uuid for metrics labels for each export, causing each export to create a new stream

Change-Id: I14e7cfb691750c4017b65e09c58bf8b729e625c3

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Fixes #<issue_number_goes_here> ☕️

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* chore(main): release 2.75.1

* chore: generate libraries at Thu Mar 26 19:05:23 UTC 2026

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Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: cloud-java-bot <cloud-java-bot@google.com>