* feat: set up UserAuditLog
* refactor: extract payment callbacks into their own files + handle subscription user_audit_log
* feat: handle account linking for user audit log
* chore: user_audit_log for mailboxes
* chore: user_audit_log for custom domains
* chore: user_audit_log for contacts
* chore: user_audit_log for directories
* fix: do not enforce cronjob being defined in choices + enable user deletion
* chore: user_audit_log for user deletion
* refactor: change emit_user_audit_log function to receive the full user object
* feat: add user_audit_log migration
* test: fix tests
* test: add some tests for user_audit_log
* fix: spf record verification user_audit_log
* chore: add missing index to user_audit_log.created_at
* chore: add missing index to alias_audit_log.created_at
