Make validation errors representation more conventional and informative

[candleindark]

Per @yarikoptic's suggestion. The json output generated for different type of validator errors are unconventional such as having a name of pydantic_validation_errs. We should change the generated JSON to represent the error as something like:

{
"validator": {"type": "Pydantic", "version": "2.10.1"},
"errors": [...]
}

The code that will needed to be changed includes

dandisets-linkml-status-tools/src/dandisets_linkml_status_tools/models.py

Lines 237 to 245 in 139ba06

	# Error encountered in validation against the Pydantic dandiset metadata model
	pydantic_validation_errs: Annotated[
	Json[PydanticValidationErrsType], Field(default_factory=list)
	]
	# Errors encountered in validation against the dandiset metadata model in LinkML
	linkml_validation_errs: Annotated[
	LinkmlValidationErrsType, Field(default_factory=list)
	]

.