query hummock stats * need to query for upstream tables being scanned instead

[kwannoel]

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• I have written necessary rustdoc comments.
• I have added necessary unit tests and integration tests.
• I have added test labels as necessary.
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Release note

[kwannoel]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• query hummock stats * need to query for upstream tables being scanned instead #20463 👈 (View in Graphite)
• feat(frontend): support backfill_progress #20092
• feat(meta): expose internal table catalog during backfill phase to batch engine #20460
• main

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[github-actions]

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[github-actions]

Close this PR as there's no further actions taken after it is marked as stale for 7 days. Sorry! 🙏

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