## Problem
The "last used" indicator for the legacy `anon` / `service_role` API
keys (Project API keys settings) was disabled because it ran a BigQuery
`edge_logs` query. It is now re-enabled against the ClickHouse-backed
`api_keys.last_used.otel` analytics endpoint.
## Current behavior
- The `anon` / `service_role` "last used" indicator is off (the
BigQuery-backed query was disabled).
## New behavior
- New `useApiKeysLastUsedQuery` hook calls the `api_keys.last_used.otel`
endpoint (timestamp params only, no SQL sent), plus its query key and
the generated platform API type.
- `DisplayApiSettings` reads last-used from this hook instead of posting
BigQuery `edge_logs` SQL. The pure `getLastUsedAPIKeys` shaper is kept
and unit-tested. Still gated by the `showApiKeysLastUsed` flag.
- Removed the disabled secret-keys (`sb_secret_`) BigQuery last-used
path, which has no ClickHouse endpoint to migrate to: drops the dead
`useLastSeen` query, the `APIKeyRow` "Last Used" column, and the unused
`showLastSeen` prop.
- Reworded the delete-confirmation copy to be accurate for both secret
and publishable keys.
## Additional context
- Backed by the platform endpoint in supabase/platform#34892 (merged and
deployed).
- Scope: `anon` / `service_role` legacy keys. Secret/publishable and JWT
signing-key "last used" are follow-ups, pending the endpoint returning
those key types.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Improvements**
* Updated API key settings to show “last used” activity for the past 24
hours using a dedicated data source and time window.
* Added clearer messaging when recent API key activity fails to load.
* Removed the “Last Used” column from API key management tables.
* **Bug Fixes**
* Improved mapping so “last used” values correctly match the intended
key and role.
* Updated API key deletion confirmation to explain required backend
changes and resulting unauthorized behavior.
* **Tests**
* Added unit tests to validate “last used” computation and edge-case
filtering.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
