partial update create mutations

database/migrations/2025_06_12_002513_create_mutations_table.php

@@ -0,0 +1,46 @@
+<?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('mutations', function (Blueprint $table) {
+            $table->id();
+            $table->string('mutation_number')->unique();
+            $table->foreignId('from_dealer_id')->constrained('dealers');
+            $table->foreignId('to_dealer_id')->constrained('dealers');
+            $table->enum('status', ['pending', 'sent', 'received', 'approved', 'rejected', 'completed', 'cancelled'])
+                  ->default('sent');
+            $table->foreignId('requested_by')->constrained('users');
+            $table->foreignId('approved_by')->nullable()->constrained('users');
+            $table->timestamp('approved_at')->nullable();
+            $table->foreignId('received_by')->nullable()->constrained('users');
+            $table->timestamp('received_at')->nullable();
+            $table->text('notes')->nullable();
+            $table->text('rejection_reason')->nullable();
+            $table->timestamps();
+            $table->softDeletes();
+
+            // Indexes untuk performa
+            $table->index(['from_dealer_id', 'status']);
+            $table->index(['to_dealer_id', 'status']);
+            $table->index(['status', 'created_at']);
+            $table->index('mutation_number');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('mutations');
+    }
+};