Improved Error Handling and Stability for Node Previews Description

Enhance the reliability and error messaging of the preview functionality between orchestration nodes.

Why is this feature important to you Data validation during the build phase is essential for trusting the orchestration engine. Vague errors prevent practitioners from effectively debugging schema or data flow issues, forcing reliance on trial-and-error testing.

How would you like the feature to work The node preview should reliably render data samples. If an error occurs, the UI should provide specific, actionable diagnostic messages (e.g., highlighting exactly which schema field or table mapping failed) rather than generic fallbacks.

Current Behaviour The preview functionality between nodes frequently fails with non-descriptive “something went wrong” or “table has changed” errors, hindering data validation