ci: disable native strip-types on Node 22+ for ts-node compat

Node 22.18+ enables type stripping by default, preempting ts-node
and causing __dirname to be undefined when detect-module reparses
test files as ESM. Disable native strip-types so ts-node handles
.ts files until mocha is replaced with node:test.

Assisted-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bennypowers

.github/workflows/verify-node.yml

@@ -54,6 +54,10 @@ jobs:
       - name: Install Playwright dependencies
         run: npx playwright install --with-deps
 
+      - name: Disable native TypeScript handling for ts-node compatibility
+        if: matrix.node-version != '18' && matrix.node-version != '20'
+        run: echo "NODE_OPTIONS=--no-experimental-strip-types" >> "$GITHUB_ENV"
+
       - name: Test
         run: npm run test:node