## Problem
The Query Performance page loaded all results in a single query with a
fixed limit of 20 rows, giving users no way to browse beyond the first
page. There was also no way to control how many rows were shown at once.
## Fix
adds pagination
## How to test
- Navigate to `/observability/query-performance` in Studio
- scroll to bottom
- should automatically load more results
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Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
