Description of problem:

When fetch:url returns a 4xx/5xx error, the system displays an error notification to the user. We need a config option like fetch:error:silent: true so schema authors can suppress these notifications and handle error states via conditional UI instead.

Prerequisites (if any, like setup, operators/versions):

Steps to Reproduce

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Actual results:

Fetch errors (4xx/5xx) always surface as user-visible notifications.

Expected results:

When fetch:error:silent: true is set, no notification is shown and schema logic can manage the error state via conditional UI.

Reproducibility (Always/Intermittent/Only Once):

Build Details:

Additional info (Such as Logs, Screenshots, etc):