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/numbers/peekNumber.js

@@ -0,0 +1,19 @@
+import { ENSURE_TYPE } from '../../sql/numbers.js';
+import request from '../request.js';
+
+export default function peekNumber(pool) {
+  return async (companyId, type, tx) => {
+    await request(pool, tx)
+      .input('companyId', companyId)
+      .input('type', type)
+      .query(ENSURE_TYPE);
+
+    const req = request(pool, tx);
+    req.input('company_id', companyId);
+    req.input('type', type);
+    req.output('value');
+
+    const result = await req.execute('peeknextnumberwithprefixandpadding');
+    return result.output.value;
+  };
+}