Add entity customer numbers and scope APIs via selected company.

Entity gets an optional unique-per-company number with allocate/peek/isNumberFree helpers. Company-scoped store methods no longer take companyId and resolve google_auth.selected_company instead.

src/store/order/index.js

@@ -10,7 +10,7 @@ import createManifestDocStore from '../manifestDoc/createStore.js';
  *
  * @example
  * const store = createOrderStore(pool);
- * const orders = await store.list(42, 1);
+ * const orders = await store.list(42);
  * // => [{ id, number, type, entityId, date }]
  */
 export default function createOrderStore(pool) {