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/PathwayTemplate.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/** Catalog binding: pathway → template_code (resolve is_current at assessment start). */
+class PathwayTemplate extends Model
+{
+    public const PHASE_ACUTE = 'acute';
+
+    public const PHASE_FOLLOW_UP = 'follow_up';
+
+    public const PHASE_ANY = 'any';
+
+    protected $table = 'care_pathway_templates';
+
+    protected $fillable = [
+        'pathway_id', 'template_code', 'is_required_on_activation', 'phase', 'sort_order',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'is_required_on_activation' => 'boolean',
+            'sort_order' => 'integer',
+        ];
+    }
+
+    public function pathway(): BelongsTo
+    {
+        return $this->belongsTo(ClinicalPathway::class, 'pathway_id');
+    }
+}