cloud(ui): add account concurrency banner to runs page (#4725)

## Description

- When users hit queued runs unexpectedly due to account concurrency,
sometimes they will go to view their runs page to investigate
- We add a banner that warns that their runs are delayed because of
account concurrency, when its occurred for at least 3 of the past 10
minutes
- The banner has a call to action view the metrics page, with better
information. The banner can also be dismissed for 24h. We send these
interactions to Segment to help us measure the efficacy of this change
- We query on whether to include this banner on load or with the refresh
button. This is powered by an existing table in ClickHouse.
- Designed with Sanjana's help!

<img width="1181" height="389" alt="Screenshot 2026-08-07 at 1 30 52 PM"
src="https://github.com/user-attachments/assets/82a72a24-bac8-4732-8788-0acb89f60524"
/>

## Release note

<!-- User-facing release note. Use "None" if this does not need release
notes. -->
None.

## Migration note

<!-- Upgrade, deployment, config, schema, or compatibility notes. Use
"None" if none. -->
None.

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Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>