Inhibition of return: do not propose the place you just looked at.

Mirrors tbp/monty/frameworks/models/salience/return_inhibitor.py::ReturnInhibitor. A salience module's goals are where to look next, and without this it would keep proposing the most interesting pixel of the last view — which is the one place it has already seen. Each call records where the sensor was, weighs every candidate location against every visit, and then ages the visits by a step.

Monty mutates the field; a struct here is a value, so a call answers both the weights and the inhibitor that produced them.