fix(gro-48): add icalToken to MANAGER mock after rebase

After rebasing onto origin/main (which added icalToken to the staff
schema via GRO-107), the MANAGER mock in groomerIsolation.test.ts was
missing the new required field. Added icalToken: null to the MANAGER
constant. factories.ts is clean (no duplicate icalToken after rebase).

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

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

@@ -19,6 +19,7 @@ const MANAGER: StaffRow = {
   name: "Manager McManager",
   email: "manager@example.com",
   active: true,
+  icalToken: null,
   createdAt: new Date(),
   updatedAt: new Date(),
 };