Prevent parameters from being edited

[jmccreight]

Currently reused parameter instances cause errors in the channel network.

My ethos is that parameters should not be edited in the dark, hidden corners of the code. They should be edited as preprocessing so that they can be provenanced with the results.

My prefered approach to this problem is currently to freeze/imutablize parameter data. Two approaches
https://adamj.eu/tech/2022/01/05/how-to-make-immutable-dict-in-python/
https://pypi.org/project/frozendict/