feat: add shared child batch creation

control-plane/test/control-plane.test.ts

@@ -447,7 +447,7 @@ test('control plane requires the administrator task-isolation migration before r
   const { readFile } = await import('node:fs/promises');
   const db = await readFile(new URL('../src/db.ts', import.meta.url), 'utf8');
   const server = await readFile(new URL('../src/server.ts', import.meta.url), 'utf8');
-  assert.equal(REQUIRED_SCHEMA_VERSION, '021_admin_task_data_plane_isolation');
+  assert.equal(REQUIRED_SCHEMA_VERSION, '022_shared_child_order_batch_create');
   assert.match(db, /schema_migrations/);
   assert.match(db, /databaseReadiness/);
   assert.match(db, /assertDatabaseSchema/);