Change names of class variables and methods that currently use "Eca"

Problem/Motivation

In 📌 Start moving code from the ECA module Active , we copied a lot of code from the eca module as a starting point for this module. As part of that issue, we made necessary changes so that the code would continue working, such as updating class names and namespaces.

Several class variables and functions (properties and methods) still use "eca" as part of their name (or all of it). In this issue, update the names, removing anything that references eca.

Either as part of this issue or a separate one, update comments the same way.

Proposed resolution

Remaining tasks

User interface changes

None

API changes

TBD: some public methods will be renamed.

Although not an API change, some protected methods will be renamed. This will affect classes in other modules that extend the classes here.

Data model changes

None