Initial Ladill Care release.

Healthcare management app: patients, appointments, consultations, lab,
pharmacy inventory, billing, and reports at care.ladill.com.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/InvestigationType.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\BelongsToOwner;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class InvestigationType extends Model
+{
+    use BelongsToOwner, SoftDeletes;
+
+    protected $table = 'care_investigation_types';
+
+    protected $fillable = [
+        'owner_ref', 'organization_id', 'name', 'code', 'category', 'description',
+        'unit', 'reference_low', 'reference_high', 'reference_text', 'price_minor', 'is_active',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'reference_low' => 'decimal:4',
+            'reference_high' => 'decimal:4',
+            'is_active' => 'boolean',
+        ];
+    }
+
+    public function organization(): BelongsTo
+    {
+        return $this->belongsTo(Organization::class, 'organization_id');
+    }
+
+    public function requests(): HasMany
+    {
+        return $this->hasMany(InvestigationRequest::class, 'investigation_type_id');
+    }
+}