Rename empty validations, enable relations on user zod object

Editor assessment

The subject states two schema changes concretely: empty validations are renamed, and relations are enabled on the user zod object, which enumerates both edits. chore is a defensible type for schema upkeep, and the missing scope is tolerable. No body or footer; the pull number gives provenance. Wording is dense but grammatical, and each half is identifiable. A proportionate message for validation-layer maintenance.