fix: provision Node for playground CI

Author: anish-sahoo

.github/workflows/ci.yaml

@@ -241,6 +241,9 @@ jobs:
     timeout-minutes: 15
     steps:
       - uses: actions/checkout@v7
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24.18.0
       - uses: jdx/mise-action@v4
         with:
           version: 2026.4.27

mise.toml

@@ -322,8 +322,7 @@ run = "nox -s tests -p 3.13"
 [tasks."test:playground"]
 description = "Run playground core tests"
 dir = "playground-tests"
-tools = { node = "24.18.0", "npm:pnpm" = "11.11.0" }
-run = "pnpm run test"
+run = "node --test '*.test.js'"
 
 [tasks."test:python:all"]
 description = "Run Python SDK tests on all supported Python versions"