Fix test-wrapper vitest path construction

Replace non-existent constants.rootNodeModulesBinPath with explicit
path.join(constants.rootPath, 'node_modules', '.bin', vitestCmd).

Fixes ERR_INVALID_ARG_TYPE error in test-wrapper.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: jdalton

scripts/test-wrapper.mjs

@@ -100,7 +100,12 @@ async function main() {
 
     // Handle Windows vs Unix for vitest executable.
     const vitestCmd = WIN32 ? 'vitest.cmd' : 'vitest'
-    const vitestPath = path.join(constants.rootNodeModulesBinPath, vitestCmd)
+    const vitestPath = path.join(
+      constants.rootPath,
+      'node_modules',
+      '.bin',
+      vitestCmd,
+    )
 
     // Expand glob patterns in arguments.
     const expandedArgs = []