Function apiCreate

packages/query-db-collection/tests/query.test.ts:6454–6461

(
        item: Omit<Assignment, 'id'>,
      )

      let nextId = 100

      const apiCreate = async (
        item: Omit<Assignment, 'id'>,
      ): Promise<Assignment> => {
        await sleep(MUTATION_DELAY)
        const created = { ...item, id: nextId++ }
        serverItems.push(created)
        return created
      }

      const apiDelete = async (id: number): Promise<void> => {
        await sleep(MUTATION_DELAY)