Confab.entitlements was missing com.apple.security.automation.apple-events,
so tccd's hardened-runtime policy silently refused to even prompt for
Automation consent to Mail.app — confirmed via tccd's own log, the same
failure class as the earlier Calendar/Contacts entitlement bug. Unhides
the Mail integration (MailTools.isHiddenPendingAppleFix = false).
Live-verified: Request Access now grants successfully on macOS 27 beta 7.