Detect when the transformation is the same and output zero as the FE estimate

[ijpulidos]

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

We have discussed about the possibility of detecting early if we are dealing with a self-transformation (system transforming onto itself). One possibility is to detect this early when we create the protocol DAG, such that the result objects can be correctly populated and used as if the whole calculation was run.

Describe the solution you'd like

There are two options.

• Detect this in the .create method for each protocol and fill the DAG/Protocol Unit and results objects accordingly
• Detect it in some unit and pass it to the other units. This requires all the units to be able to handle such scenario graciously, this one probably requires more work.

Describe alternatives you've considered

Additional context