restructure retribution calculations table

app/Models/RetributionIndex.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class RetributionIndex extends Model
+{
+    protected $fillable = [
+        'building_type_id',
+        'coefficient',
+        'ip_permanent',
+        'ip_complexity',
+        'locality_index',
+        'infrastructure_factor',
+        'is_active'
+    ];
+
+    protected $casts = [
+        'coefficient' => 'decimal:4',
+        'ip_permanent' => 'decimal:4',
+        'ip_complexity' => 'decimal:4',
+        'locality_index' => 'decimal:4',
+        'infrastructure_factor' => 'decimal:4',
+        'is_active' => 'boolean'
+    ];
+
+    /**
+     * Building type relationship
+     */
+    public function buildingType(): BelongsTo
+    {
+        return $this->belongsTo(BuildingType::class, 'building_type_id');
+    }
+
+    /**
+     * Scope: Active only
+     */
+    public function scopeActive($query)
+    {
+        return $query->where('is_active', true);
+    }
+
+    /**
+     * Get all indices as array
+     */
+    public function getIndicesArray(): array
+    {
+        return [
+            'ip_permanent' => $this->ip_permanent,
+            'ip_complexity' => $this->ip_complexity,
+            'locality_index' => $this->locality_index,
+            'infrastructure_factor' => $this->infrastructure_factor
+        ];
+    }
+}