Southbound Error Responses Not Properly Surfaced in Value Verification Section

[TejInaco]

When using the Contribute to Catalog workflow and a southbound endpoint is defined, error information returned during the preview test in Section 2.3: Value Verification is not clearly surfaced to the user.
Currently, there is no mechanism to display these errors as warnings within the UI. This can lead to confusion or missed diagnostics during the verification process.

Expected Behavior:

If the southbound endpoint returns error information during preview, it should be presented to the user as a warning.
The warning should be displayed above the table in Section 2.3.
The area below the table should remain reserved for property test results only.