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/Models/AssessmentScore.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\BelongsToOwner;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class AssessmentScore extends Model
+{
+    use BelongsToOwner;
+
+    protected $table = 'care_assessment_scores';
+
+    protected $fillable = [
+        'owner_ref', 'assessment_id', 'template_code',
+        'total_score', 'max_score', 'subscores', 'severity_label', 'computed_at',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'total_score' => 'decimal:4',
+            'max_score' => 'decimal:4',
+            'subscores' => 'array',
+            'computed_at' => 'datetime',
+        ];
+    }
+
+    public function assessment(): BelongsTo
+    {
+        return $this->belongsTo(Assessment::class, 'assessment_id');
+    }
+}