ci(node): run vitest suite instead of missing test_omnibus.ts

`packages/openmemory-js/tests/test_omnibus.ts` was renamed to
`tests/omnibus.test.ts` in cbc8c84 ("port ad-hoc tsx scripts to vitest
specs"), but the CI step kept calling the old path with `npx tsx`. The
"Test Node.js SDK" job has been red on every PR since.

Switch the step to `npm test` so the omnibus spec, the temporal /
multilingual / webhook / verify suites, and any new vitest specs (e.g.
the per-tenant MCP regression added in the parent commit) all run.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: vincenzopalazzo

.github/workflows/ci.yml

@@ -54,6 +54,10 @@ jobs:
           npm ci
           
       - name: Run Verification Test
+        # `tests/test_omnibus.ts` was ported to vitest as
+        # `tests/omnibus.test.ts` in cbc8c84; this step has been failing
+        # ever since. Run the whole vitest suite so omnibus + the rest of
+        # the per-tenant / temporal / multilingual specs are exercised.
         run: |
           cd packages/openmemory-js
-          npx tsx tests/test_omnibus.ts
+          npm test