## Problem
Studio copy ties disk IO burst behavior to compute size thresholds and
says the IO budget "resets".
Burst eligibility isn't a single size cutoff
EBS burst credits refill continuously while disk usage runs below
baseline
Docs already use this framing (#50016)
Fixes PROD-665
## Solution
Three copy changes:
- `UnavailableChartBlock.tsx`: the burst balance chart placeholder no
longer names a size. It now describes sustained IO with no burst credit
pool
- `database-charts.ts`: the Disk IO Burst Balance tooltip describes the
EBS burst credit pool without referencing instance size
- `ResourceExhaustionWarningBanner.constants.ts`: the warning and
critical banners say the budget refills whenever disk usage runs below
baseline, instead of "resets"
## Review instructions
1. Read the diff. Copy changes only.
2. Optional: on a project with burstable disk IO, open Reports >
Database and hover the Disk IO Burst Balance chart title to see the new
tooltip.
## Checklist
Check all before review:
- [x] I have read
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
- [x] If I wrote a new docs topic or edited an existing topic, I used
the `/write-the-docs` or `/edit-the-docs` skill, which references
[WORD_LIST](https://github.com/supabase/supabase/blob/master/apps/docs/WORD_LIST.md)
and the docs
[CONTRIBUTING](https://github.com/supabase/supabase/blob/master/apps/docs/CONTRIBUTING.md)
guide
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
## Documentation
* Updated disk I/O chart messaging to explain that some compute types
sustain disk throughput without a burst credit pool to track.
* Clarified that disk I/O burst budgets refill when demand is at or
below baseline, and that throughput remains at baseline until the budget
refills.
* Updated the burst-balance chart tooltip to describe how compute uses
the EBS burst credit pool.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Lukas Bernert
d51ed9f451