Terra Vita Hub — v255 visual additions

These visuals tighten the homepage authority boundary and collapse interpretation into one canonical institutional review route.

10_What_Terra_Vita_Hub_Governs_vs_Retained_by_Institutions.webp: What Terra Vita Hub Governs vs Retained by Institutions
11_Sovereign_Programme_Deep_Dive_Composite.webp: Sovereign-Programme Deep Dive Composite
12_Sovereign_Programme_Deep_Dive_Layered_Flow.webp: Sovereign-Programme Deep Dive Layered Flow
13_Governance_Schema_Stack.webp: Governance Schema Stack
14_Lifecycle_Committee_Review_Pack_Export_Posture.webp: Lifecycle Process to Committee Review Pack to Export Posture
15_Governance_Invariants.webp: Governance Invariants
16_Sovereign_Programme_Deep_Dive_Four_Panel.webp: Sovereign-Programme Deep Dive Four Panel
