feat(aggregation): expose extra fields for aggregations#2827

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congx4 wants to merge 3 commits intomainfrom

congxie/supportAgg

Commits on Feb 3, 2026

feat(aggregation): expose sum and count in Average metric result
congx4
committed
feat(aggregation): expose sketches for percentiles and cardinality
congx4
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Commits on Feb 4, 2026

fix format
congx4
committed