feat: add all database migrations

database/migrations/2026_04_02_205140_create_activities_table.php

@@ -0,0 +1,31 @@
+<?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('activities', function (Blueprint $table) {
+            $table->id();
+            $table->string('title');
+            $table->text('description')->nullable();
+            $table->date('start_date');
+            $table->date('end_date');
+            $table->foreignId('created_by')->constrained('users');
+            $table->enum('status', ['draft', 'pending', 'approved', 'rejected'])->default('draft');
+            $table->foreignId('approved_by')->nullable()->constrained('users');
+            $table->timestamp('approved_at')->nullable();
+            $table->timestamp('executed_at')->nullable();
+            $table->text('execution_notes')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('activities');
+    }
+};