Interop Naming

Opening this issue for discussion

There is often confusion around the term "message" as it is in practice it is a log. The original name was chosen to be generic over the data structure. We should consider renaming things so that its more clear exactly what data structures are used.

For example we could rename the `validateMessage` function to `validateLog` and rename `executeMessage` to `executeLog`.

We could also rename the more generic terms "initiating message" and "executing message".

This is a heavily breaking change and should be done sooner rather than later

No files or tests are named. Start by locating validateMessage and executeMessage, then review the surrounding terminology for "initiating message" and "executing message." Done would require an agreed breaking rename and corresponding updates wherever these terms are used.

Written by the indexing model from the issue text.