Implement superadmin audit log for mutations

database/migrations/2026_01_02_100805_create_super_admin_action_logs_table.php

@@ -0,0 +1,35 @@
+<?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('super_admin_action_logs', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('actor_id')->nullable()->constrained('users')->nullOnDelete();
+            $table->string('action', 120);
+            $table->nullableMorphs('subject');
+            $table->string('source', 200)->nullable();
+            $table->json('metadata')->nullable();
+            $table->timestamp('occurred_at')->useCurrent();
+            $table->timestamps();
+
+            $table->index(['action', 'occurred_at']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('super_admin_action_logs');
+    }
+};