feat: tambah budget kegiatan dengan alur threshold approval/voting

database/migrations/2026_04_05_161652_add_budget_to_activities_and_activity_id_to_cash_records.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::table('activities', function (Blueprint $table) {
+            $table->unsignedBigInteger('budget')->nullable()->after('description');
+        });
+
+        Schema::table('cash_records', function (Blueprint $table) {
+            $table->foreignId('activity_id')->nullable()->constrained('activities')->nullOnDelete()->after('category_id');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('cash_records', function (Blueprint $table) {
+            $table->dropForeignIdFor(\App\Models\Activity::class, 'activity_id');
+            $table->dropColumn('activity_id');
+        });
+
+        Schema::table('activities', function (Blueprint $table) {
+            $table->dropColumn('budget');
+        });
+    }
+};