Clarify CORPIFORM repository surface and execution posture

[midiakiasat]

Summary

• clarifies CORPIFORM as the execution boundary in the AUCTORISEAL → CORPIFORM → VERIFRAX stack
• expands the repository surface map, execution model, refusal model, outputs, and authority dependency posture
• makes the public README align more explicitly with current non-final pre-seal release posture

Result

• the repository entry surface is now materially clearer for operators, auditors, and integrators
• CORPIFORM is described more precisely as governed execution rather than general orchestration
• the README now better matches the real repository structure and execution semantics

Boundary

This change clarifies repository posture and execution surfaces only. It does not publish a package boundary, change execution policy, or alter release posture.