Rename Controller metadata `anonymous` property

The `anonymous` property of the Base Controller v2 metadata state is meant to indicate whether the state is already anonymized or not, or if it's a function, it's meant as an anonymizing function.

This property is often misinterpreted to mean the _opposite_ of what it's intended to mean though. People have thought `anonymous: true` means that the data _should be anonymized_, rather than indicating that it has already been anonymized.

To clarify the meaning, this should be renamed to something easier to understand. Maybe `anonymized`?

Start by locating the Base Controller v2 metadata definition and every use of the `anonymous` property across the TypeScript monorepo. Trace how the boolean or function is interpreted before renaming the references; done means the metadata consistently uses the clearer name without changing its existing anonymization semantics.

Written by the indexing model from the issue text.