View-as writes attributed to real admin

Elazar directive 2026-07-23 (deferred to bwi by his order): under 'ver como usuario' (VENUS-149) mutations are hard-blocked by requireNotImpersonating() at 74 sites. Desired: edits proceed, domain authorship (createdBy/decidedBy/archive-GUC app.user_id) stamped with realAdminId, banner drops 'solo lectura'. accountableActorId() already returns realAdminId for telemetry (VENUS-111). OPEN FORK for Elazar before implementation: (a) writes limited to target-user permissions but recorded as admin, or (b) admin permissions apply while viewing. Class-A (auth gates) => audit design-ping before implementing.