supabase / supabase / 25746795097

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feat(studio): cross-link disk IO usage to observability charts (#45376)

## Problem

Users on the Infrastructure activity tab see a Disk IO Bandwidth chart
that plots burst budget percentage rather than real disk activity. The
more granular IOPS and throughput charts live in Observability, but
there is no path between the two pages — users either dismiss real
warnings or file support tickets.

Reported in [Linear
DEBUG-64](https://linear.app/supabase/issue/DEBUG-64).

## Fix

Two cross-links into Observability/Database:

1. **Below the Disk IO Bandwidth chart**
([InfrastructureActivity.tsx](apps/studio/components/interfaces/Settings/Infrastructure/InfrastructureActivity.tsx))
an Admonition with a "View detailed IOPS and throughput" button. Only
shown for the disk IO section, not CPU/RAM.
2. **In the disk IO exhaustion banner's Troubleshoot dropdown**
([ResourceExhaustionWarningBanner.tsx](apps/studio/components/ui/ResourceExhaustionWarningBanner/ResourceExhaustionWarningBanner.tsx))
a "View metrics" item alongside Documentation and Ask AI Assistant.

The banner part is wired via a new optional `metricsHref` on
`ResourceWarningMessage`, so CPU/RAM warnings can opt in later by adding
their own observability path.

## Test plan

- [ ] Visit `/project/{ref}/settings/infrastructure` on a project that
does not have dedicated I/O resources. Confirm the new Admonition
appears under the Disk IO chart and the button navigates to
`/project/{ref}/observability/database`.
- [ ] On a project with dedicated I/O resources, confirm only the
existing "dedicated I/O" Admonition shows (no double-Admonition).
- [ ] Trigger (or mock) a `disk_io` resource warning; confirm the
banner's Troubleshoot dropdown shows "View metrics" first and links to
Observability.
- [ ] Trigger a `cpu` or `ram` warning; confirm the dropdown does NOT
show the new item.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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