added subscriber profile

database/migrations/2026_09_09_114642_create_unified_billing_transactions_table.php

@@ -0,0 +1,28 @@
+<?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('unified_billing_transactions', function (Blueprint $table) {
+            $table->id();
+            $table->unsignedBigInteger('service_id');
+            $table->string('msisdn');
+            $table->string('content');
+            $table->string('cost')->nullable();
+            $table->timestamp('transaction_date');
+            $table->timestamps();
+
+            // Index for fast searching by subscriber per service
+            $table->index(['service_id', 'msisdn']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('unified_billing_transactions');
+    }
+};