## 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
---------
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
## Context
Adds a source filter for the query performance advisor so you can filter
out queries from the dashboard, or not from the dashboard
<img width="309" height="217" alt="image"
src="https://github.com/user-attachments/assets/c1fab9af-e57e-482f-afdb-d77a6600edb3"
/>
For transparency how this works:
- Queries fired via the dashboard through the /query endpoint get
enriched with metadata from the API to include a comment like `--
source: dashboard`
- That's mainly how this filter works atm, to check if this comment
exists if the source "Dashboard" is selected, and the inverse if the
source "Non dashboard" is selected
