Strengthen ORBISTIUM public boundary README

[midiakiasat]

Summary

Strengthen the ORBISTIUM public README so its sovereign role is explicit, bounded, and non-overlapping.

Before

• thin surface
• underpowered public boundary articulation
• weak adjacent-surface wiring
• insufficient distinction from neighboring sovereign functions

After

• exact ORBISTIUM opening definition
• normalized status and boundary sections
• explicit canonical world-state meaning in-system
• explicit non-overlap with law, cognition, reconciliation, execution, verification, and authority
• explicit distinction between canonical state and mere reference

Verification

• # ORBISTIUM
• ## Status
• ## Boundary
• ## What it does
• ## What it does not do
• ## Adjacent sovereign surfaces
• ## Public surface
• ## Package / host / repo truth
• ## Canonical state meaning in-system
• ## Not this