Layer 1: createReportRun rejects a user-triggered run whose coverBrandPortId
is a port the triggering user can't access (userCanAccessPort: super-admin or
userPortRoles membership). Layer 2: renderReportRun only honors the override
when it equals run.portId or the run's user is a member, else falls back to
the source port's branding — so a forged/scheduled config can't leak another
tenant's logo/name.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>