Param verification layer: prominently documented symbol for hooking in debuggers

Especially for the parameter verification layer it would be *immensely* useful to have a well documented function name that gets called whenever the layer reports an issue. That way, people could define a breakpoint in their debugger and simply look at the callstack to see where the problem occurred (and what the offending parameters were).

Start by tracing the parameter verification layer's issue-reporting path. Identify where reported issues can expose a stable, documented function name suitable for debugger breakpoints, and verify that the call stack still shows the offending parameters. Done means the hook is documented and is invoked whenever the layer reports an issue.

Written by the indexing model from the issue text.