Accelerate Reference Spine Overview Lists

Why

The owner console overview and runs pages block on reference spine list routes. Live measurement after the connector-summary fix showed /_ref/traces at about 365-900ms and /_ref/runs?limit=100 at about 700-950ms. The traces route was doing a full aggregate over roughly 579k spine events to show six recent rows.

What Changes

• Add a Postgres recent-event first-page path for unfiltered /_ref/traces, /_ref/runs, and /_ref/grants overview lists.
• Keep filtered and cursor-paginated requests on the existing aggregate path.
• Hydrate the selected first-page summaries concurrently with a bounded worker count instead of issuing every summary read sequentially.
• Provision Postgres recent-correlation indexes during schema bootstrap and migration.
• Stop the dashboard home from fetching failed traces/runs that are no longer used by the hero or any rendered block.

Capabilities

Modified:

• reference-implementation-architecture

Impact

• Runtime: reference-implementation/lib/postgres-spine.js
• Runtime: reference-implementation/server/postgres-storage.js
• Console: apps/console/src/app/dashboard/page.tsx
• Tests: spine overview-list regression tests