Bitsail Support Field Processing（like encryption)

[FantasticLiar]

Is your feature request related to a problem? Please describe

Noop

Describe the solution you'd like

We want to complete the encryption of some fields during the data synchronization phase, in order to shield some sensitive information.

Describe alternatives you've considered

Maybe this operation can be converted at source or sink, but is there a more general way?

Additional context

[hk-lrzy]

@FantasticLiar Thanks for your issue, i think encryption is an important part for the data synchronization, and we already have plan for this feature.

[yucongcong654]

Would you like to get involved in the development of this feature? @FantasticLiar