Update documentation and routes to remove /v1 prefix

- Update all route documentation comments
- Update README, env.example, and starter-docs
- Update install.sh

env.example

@@ -129,10 +129,10 @@ PLAUSIBLE_SITE_ID=cashumints.space
 #   npm run workers
 #
 # Test health:
-#   curl http://localhost:3000/v1/health
+#   curl http://localhost:3000/health
 #
 # Test admin (requires ADMIN_API_KEY):
-#   curl -H "X-Admin-Api-Key: YOUR_KEY" http://localhost:3000/v1/admin/system/metrics
+#   curl -H "X-Admin-Api-Key: YOUR_KEY" http://localhost:3000/admin/system/metrics
 #
 # View docs:
 #   open http://localhost:3000/docs