## Problem
The Memory usage chart in the database report showed RAM used, cache,
free, and total, but did not include swap. Swap activity is a meaningful
signal of memory pressure and was only visible in a hidden standalone
chart.
## Fix
Added `swap_usage` (from the `infra-monitoring` provider) as an
additional series in the `ram-usage` Memory chart. The series uses
`omitFromTotal: true` so it does not inflate the stacked total, and
carries the same tooltip text as the hidden standalone swap chart. The
standalone `swap-usage` chart remains hidden as before.
## How to test
- Open the database report for a project on any compute size.
- Navigate to the Memory usage chart.
- Confirm a "Swap" series appears in the legend and renders data
alongside Used, Cache + Buffers, and Free.
- Hover a data point and confirm the tooltip shows a Swap value with the
memory-pressure description.
- Confirm the Swap value does not contribute to the stacked total.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added a "Swap" metric to the RAM usage chart in reports, displaying
swap memory usage information with an updated tooltip.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
