docs(okf): frontmatter OKF + rich abstracts nas descriptions

Normalizacao OKF dos .md: type/title/description/timestamp/layer +
descriptions factuais (rich abstracts). Apenas .md tracked; corpos intactos.
Parte da aplicacao OKF a /Dados/Dev (28-06-2026).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

specs/001-care-api-sistema/plan.md

@@ -1,3 +1,11 @@
+---
+type: Document
+title: Plan
+description: >-
+  Branch: `001-care-api-sistema` | Date: 2025-09-12 | Spec: spec.md
+timestamp: 2025-09-11T23:21:13.060004+00:00
+layer: wiki
+---
 # Implementation Plan: Care API - Sistema de gestão de cuidados de saúde
 
 **Branch**: `001-care-api-sistema` | **Date**: 2025-09-12 | **Spec**: [spec.md](./spec.md)