In galaxy-importer:

• Add a 2000 char limit for the URL fields in collection metadata: documentation, homepage, issues, repository.
• Add a 64 char limit for authors field

For the authors field, currently the limit is noticed when there is a database error in AH, and this is displayed to the user:
{'authors': {1: [ErrorDetail(string='Ensure this field has no more than 64 characters.', code='max_length')]}}
Adding the author check to the importer allows for this to be caught in AH before import is finished, caught in Community Galaxy, and caught if the galaxy-importer cli is run by user for validation.

Issue migrated from: https://github.com/ansible/galaxy_ng/issues/162