Handle scanner POSTs to catch-all routes

[kentcdodds]

Summary

• add an install-time patch for @epic-web/workshop-app so the routes/$ catch-all has a normal 404 action for unsupported method requests
• keep the fix scoped to the catch-all/splat route instead of suppressing all getInternalRouterError events
• add a focused node test covering the patch and idempotency

Sentry

• epicshop EPICSHOP-F0 / 7447885629
• Example noisy request: POST *splat /connectors/resource/index.php

Validation

• npm --prefix epicshop run postinstall
• npm --prefix epicshop run test:patch
• npm run typecheck
• npm run lint
• Smoke: POST /connectors/resource/index.php returned HTTP/1.1 404 Not Found with no server error log