docs: refresh test count (528)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

STATUS.md

@@ -68,7 +68,7 @@ header stacks instead of overlapping the title).
 | --- | --- |
 | `npm install` | clean |
 | `npm run typecheck` (root + workspaces) | clean, no errors |
-| `npm test` (`vitest run`) | **473 tests pass across 94 files** (5 Postgres-gated skipped) |
+| `npm test` (`vitest run`) | **528 tests pass across 97 files** (5 Postgres-gated skipped) |
 
 The 416 figure is the live `vitest run` count measured 2026-07-19; the suite has
 grown from the D18 go-live cluster through the D20–D33 work (tickets, module fields,