check_date_like() for detecting date-format
inconsistencies in character columns, with an explicit, required
format per column (no automatic format guessing).validate_df() gained an optional
date_columns argument to run date checking as part of the
full report.check_types() to
check_numeric_like(), and its $types result
field to $numeric_like, for clarity now that there are two
type-inconsistency checks.