Most log messages are unique enough that a simple search

Yes, while this is accurate, it was very useful to me while debugging multisig to be able to read the log output without having to go search. The reason I added the bespoke cataloging of log messages was because the bespoke labels added context that helped me think through the problem without having to constantly search the codebase.

IMO it's a set of tradeoffs. Add a bit more length to log messages, gain the ability to quickly understand what is going on.

As the person who wrote many, if not most of them, them I can see why you would lean in favor of avoiding the bespoke labels because you have memorized the context and can follow the logic often without having to refer back to the codebase.

As a newcomer to the codebase I found it tremendously helpful to have that specific tagging in the label. I imagine such labels will help other newcomers quickly understand the meaning of the log messages.

In the latest commit I addressed the class name prefix comment and metadata comments from this morning's dev meeting. The class names are removed and the metadata format string is removed as library users will customize that themselves.