Deploy should warn when a table might be deleted

[tbeseda]

Is your feature request related to a problem? Please describe.

When I change the keys of a table (keeping the name the same), a new table is created and the old table is deleted 😱

Describe the solution you'd like

I understand that changing the keys in a table is essentially telling CloudFormation, "this is a new table". But I'd like the deploy to fail instead of potential data loss.

Describe alternatives you've considered

I thought about documentation, but I don't think that's enough when data is at stake.

Additional context or notes

I can't be certain, but I think this might be a new behavior in CloudFormation. I have not researched it.