[FR][DAC] Consideration: add validation on exceptions values

[brokensound77]

Note: this work will target the DAC-feature branch

related to #3407

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This is a consideration and not a commitment to work at this point. We should review the feasibility and supportability. If it is doable and not deemed maintainable, we can move the example code to the DAC reference for users to manually implement.

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Look into adding validation on exceptions data using the same schema the rule logic is validated against.