fix(GRO-1365): add missing imports for and/eq/exists/or in test

The vi.mock factory uses db.and/eq/exists/or from the imported module,
but TypeScript's module-level import binding (const declarations)
can't be referenced inside the async factory before initialization.
Adding top-level imports from "../db/index.js" and using them
directly in the mock return fixes the TDZ error.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/api/src/__tests__/petsExtendedFields.test.ts

@@ -2,6 +2,7 @@ import { describe, it, expect, vi, beforeEach } from "vitest";
 import { Hono } from "hono";
 import type { AppEnv, StaffRow } from "../middleware/rbac.js";
 import { petsRouter } from "../routes/pets.js";
+import { and, eq, exists, or } from "../db/index.js";
 
 // ─── Mock staff fixtures ──────────────────────────────────────────────────────