AEM Forms server validation

While client-side validation (e.g., using JavaScript) improves user experience by providing instant feedback, it can be easily bypassed by:

- Disabling JavaScript
- Manipulating form data via browser dev tools
- Sending crafted requests directly to the server

Server-side validation, on the other hand:

- Ensures that all submitted data is properly checked regardless of client behavior
- Protects against malicious inputs
- Enforces business rules that may require access to backend systems

In AEM Forms foundation components I found an option to explicitely enable server-side validation, while I don't find this option in AEM Forms core components? Has this feature been missed / not implemented yet?

Start by comparing server-side validation support and configuration in AEM Forms foundation components with the AEM Forms core components. Trace the core component form-validation entry points and determine the expected behavior for submitted data when client-side validation is bypassed. Done should mean the supported scope and implementation requirements are clearly established.

Written by the indexing model from the issue text.