chore: initial commit of existing codebase

app/Models/StockLevel.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class StockLevel extends Model
+{
+    use HasFactory;
+
+    protected $fillable = ['item_id', 'warehouse_id', 'quantity'];
+
+    protected $casts = ['quantity' => 'decimal:2'];
+
+    public function item()
+    {
+        return $this->belongsTo(Item::class);
+    }
+
+    public function warehouse()
+    {
+        return $this->belongsTo(Warehouse::class);
+    }
+}