Only fail on new policy violations

[vmelnychuk-bcs]

What is your feature request about?

We are evaluating usage of dependency track tool. In our current setup it has been running in "shadow" mode with all configured policies set to Info on the tool itself. We found that it would be useful for us to have an option to fail pipeline only if the new policy was violated

Describe the solution you'd like

As an example say we have a policy of type INFO. It is been there for quite some time. We now want to change the policy to FAIL but would like projects that previously had same policy violation but with INFO to not fail. And all the new projects to fail the pipeline.

I understand this is very specific issue but would like to get some insights from you if this is something feasible to implement?

Additional context

No response