Validate types in CI

.github/workflows/self-test.yml

@@ -0,0 +1,17 @@
+name: Run the project's self-tests
+on: [push, pull_request]
+
+jobs:
+  runtest_task:
+    name: Validate TypeScript types
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+      - name: Install NodeJS 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+      - name: Test types
+        run: npm run test-types

stressor/package.json

@@ -4,7 +4,8 @@
   "description": "Stress test Test Plans via CI workflows",
   "main": "stress-test.mts",
   "scripts": {
-    "cancel-runs": "node --loader ts-node/esm cancel-all-workflows.mts"
+    "cancel-runs": "node --loader ts-node/esm cancel-all-workflows.mts",
+    "test-types": "tsc --noEmit"
   },
   "author": "",
   "license": "MIT",