revert: remove concurrency: false — breaks Node.js v22/v26/Windows

The concurrency: false option on the suite caused "Column family already
dropped!" failures on Node.js v22, v26, and Windows (all passing on main
without the option). The Bun failures in #1236 are pre-existing flakes:
the terminology test passes on main including all Bun shards.

Closing investigation — no change needed here; re-run when Bun flakes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: kriszyp

integrationTests/apiTests/terminology.test.mjs

@@ -20,7 +20,7 @@ import { awaitJobCompleted } from './utils/operations.mjs';
 // Resolve the CSV fixture path relative to this file so Harper can read it.
 const SUPPLIERS_CSV = path.join(path.dirname(fileURLToPath(import.meta.url)), 'data/Suppliers.csv');
 
-suite('Terminology aliases (database / primary_key)', { concurrency: false }, (ctx) => {
+suite('Terminology aliases (database / primary_key)', (ctx) => {
 	let client;
 
 	before(async () => {