done restructure calculation retribution

database/migrations/2025_06_19_103850_create_calculable_retributions_table.php

@@ -0,0 +1,42 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('calculable_retributions', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('retribution_calculation_id');
+            $table->morphs('calculable'); // calculable_id & calculable_type (automatically creates index)
+            $table->boolean('is_active')->default(true)->comment('Status aktif calculation');
+            $table->timestamp('assigned_at')->useCurrent()->comment('Kapan calculation di-assign');
+            $table->text('notes')->nullable()->comment('Catatan assignment');
+            $table->timestamps();
+            
+            // Additional indexes for better performance
+            $table->index('is_active');
+            $table->index('assigned_at');
+            
+            // Foreign key constraint
+            $table->foreign('retribution_calculation_id')
+                  ->references('id')
+                  ->on('retribution_calculations')
+                  ->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('calculable_retributions');
+    }
+};