Add company-scoped unit list/upsert/delete and article unit patches.

Units are isolated per company; article detail exposes full unit shape, and unused units can be deleted safely via FK NO ACTION.

src/store/unit/list.js

@@ -0,0 +1,19 @@
+import { LIST_BY_COMPANY } from '../../sql/unit.js';
+import resolveCompanyAccess from '../companyuser/resolveCompanyAccess.js';
+import shapeUnit from './shapeUnit.js';
+
+export default function list(pool) {
+  const access = resolveCompanyAccess(pool);
+
+  return async (googleAuthId, companyId) => {
+    const { languageId } = await access(googleAuthId, companyId);
+
+    const result = await pool
+      .request()
+      .input('companyId', companyId)
+      .input('languageId', languageId)
+      .query(LIST_BY_COMPANY);
+
+    return result.recordset.map(shapeUnit);
+  };
+}