Added production calendar model file

app/Models/ProductionCalendar.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class ProductionCalendar extends Model
+{
+
+    use SoftDeletes;
+
+    protected $fillable = [
+        'plant_id',
+        'leave_dates',
+        'working_days',
+        'created_at',
+        'created_by',
+        'updated_at',
+        'updated_by',
+    ];
+
+    public function plant(): BelongsTo
+    {
+        return $this->belongsTo(Plant::class);
+    }
+}