[Feature] Support Returning SQL Field Information in vmind.generateChart

[oChristineo]

What problem does this feature solve?

After automatically generating a chart configuration with vmind.generateChart, users want to:

• Dynamically re-fetch or transform data on the frontend using libraries like alasql , based on the original field semantics.
• Decouple chart configuration from static data, allowing charts to adapt when data sources evolve. This is especially useful in low-code platforms, dashboards, or BI tools where chart templates should remain reusable across changing datasets.

What does the proposed API look like?

Support Returning SQL Field Information in vmind.generateChart