Khaos Brain v0.8.4

• Harden the two Luna/max KB maintenance owners against outer timeouts and stale writer leases.
• Make native receipt sidecars safe under Windows MAX_PATH while preserving full SHA-256 validation.
• Make FlowGuard model-source fingerprints portable across Windows/Linux checkouts and install the exact pinned FlowGuard consumer projection in CI.
• Verify one real Sleep→Dream cycle followed by one Organization maintenance cycle, plus main and tag CI.