Load private schemas in subfolder

[udgover]

It turns out that for private schemas they have to be at the root of the private folder to be able to be read. If private schemas are located under a subfolder such as private/foobar, they won't be loaded.

[1nv8rzim]

The other half of this, is that this is not logged properly.

The existing code never has module_name unless the file is found under core.schemas.{schema_root_type} or core.schemas.{schema_root_type}.private:

 for schema_file in Path(__file__).parent.glob(f"{schema_root_type}/**/*.py"):
        if schema_file.stem == "__init__":
            continue
        if schema_file.parent.stem == schema_root_type:
            # module_name set here
            module_name = f"core.schemas.{schema_root_type}.{schema_file.stem}"
        elif schema_file.parent.stem == "private":
            # and here
            module_name = f"core.schemas.{schema_root_type}.private.{schema_file.stem}"
        # any other case module_name is never set
        try:
            # and used here
            register_module(module_name, base_module)
        except Exception:
            logger.exception(f"Failed to register classes from {module_name}")

As I understand there should be logger.exception(f"Failed to register classes from {module_name}" which log module_name and None since it is never declared in the case that a nested schema exists. Nevertheless, when I found this issue, I could not find any logs to support this.