Add POS Pro subscription billing and free-tier limits.

Wallet-backed Pro unlocks unlimited products, restaurant mode, catalog imports, and ecosystem sync features.

Co-authored-by: Cursor <cursoragent@cursor.com>

database/migrations/2026_06_30_100000_create_pos_pro_subscriptions_table.php

@@ -0,0 +1,34 @@
+<?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('pos_pro_subscriptions', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('user_id')->unique()->constrained()->cascadeOnDelete();
+            $table->string('status', 16)->default('active');
+            $table->unsignedInteger('price_minor');
+            $table->char('currency', 3)->default('GHS');
+            $table->boolean('auto_renew')->default(true);
+            $table->timestamp('started_at')->nullable();
+            $table->timestamp('current_period_end')->nullable();
+            $table->timestamp('last_charged_at')->nullable();
+            $table->timestamp('canceled_at')->nullable();
+            $table->string('last_reference')->nullable();
+            $table->text('last_error')->nullable();
+            $table->timestamps();
+
+            $table->index(['status', 'current_period_end']);
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('pos_pro_subscriptions');
+    }
+};