feat(assessments): layered clinical assessment engine end-to-end

Add a template-driven assessment system with universal intake, clinical
pathways, disease instruments (stroke MVP + extended, diabetes, and ten
specialty packs), scoring, patient outcome trends, REST/API + FHIR
export, and Enterprise org-level assessment analytics. Seed packs and
design/licensing docs ship for deploy and pre-GA review.

app/Contracts/Care/ScoresAssessment.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace App\Contracts\Care;
+
+use App\Models\Assessment;
+
+interface ScoresAssessment
+{
+    /**
+     * @return array{total: ?float, max: ?float, subscores: array<string, float|int>, severity_label: ?string}
+     */
+    public function score(Assessment $assessment): array;
+}