feat: add all database migrations

database/migrations/2026_04_02_205142_create_approvals_table.php

@@ -0,0 +1,25 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('approvals', function (Blueprint $table) {
+            $table->id();
+            $table->string('model_type');
+            $table->unsignedBigInteger('model_id');
+            $table->unsignedTinyInteger('required_approvals')->default(1);
+            $table->enum('status', ['pending', 'approved', 'rejected'])->default('pending');
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('approvals');
+    }
+};