This function checks the types and classes of the columns in the data against the schema
defined in the Validator object.
Arguments
- validator
A Validator object containing the data and schema to check against. The schema
should define the expected type and optionally the class for each column.
Value
The updated Validator object with quality assurance (QA) entries added for type and
class checks. Each QA entry includes a description, pass/fail status, and any failing column IDs.
