CORPORATE-PILLARS-READ-MODEL (Evidence Separation) & CORPORATE-PILLARS-SURFACE (Visible Overview Context)

Release digest

CORPORATE-PILLARS-READ-MODEL (Evidence Separation) — Company stats now expose an additive corporate_pillars.v1 payload that separates employee, market, and public evidence into coverage, freshness, and confidence states without replacing the canonical Trust Score.
CORPORATE-PILLARS-SURFACE (Visible Overview Context) — /app/overview now renders a corporate three-pillar context panel so analysts can see which evidence lanes are ready, low coverage, or missing before opening a report read.

Added regression coverage for the additive company stats payload and the Overview source contract.
Verified the targeted backend contract tests, dashboard lint, and dashboard production build locally.
Updated the corporate scoring architecture contract to document corporate_pillars.v1 as an explanatory read model. No public knowledge-base change is required yet because this is an internal dashboard and API surface, not public product guidance.