Matrix restoration validation checklist

• No room topology editor, script loader, target override or ordering observer.
• Matrix retains eight Pluto ports even with fewer content receivers.
• Original receiver count and stable IDs are visible in Setup.
• Mapped TV renames preserve receiver IDs, fields, groups and credentials.
• Unmapped output renames persist labels without inventing receivers.
• Source names/endpoint IDs survive reload; failures remain visible and retryable.
• An unchanged refresh preserves routing button identity and open drawer drafts.
• Normal configuration GETs do not write or expose archived topology.
• Old topology saves return 409 without altering configuration, including mixed payloads.
• Archived topology is preserved byte-for-byte for backup/recovery.
• Morning Announcements, scheduler recovery, Background Music, Android identity and ADB trust remain unchanged.
• Test actual hardware routing/audio separately; browser fixtures are not proof of live integration health.