Add coupon fraud context and analytics tracking

database/migrations/2026_01_02_231420_add_request_context_to_checkout_sessions_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('checkout_sessions', function (Blueprint $table) {
+            $table->string('ip_address', 45)->nullable()->after('provider_metadata');
+            $table->string('device_id', 64)->nullable()->after('ip_address');
+            $table->text('user_agent')->nullable()->after('device_id');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('checkout_sessions', function (Blueprint $table) {
+            $table->dropColumn(['user_agent', 'device_id', 'ip_address']);
+        });
+    }
+};

database/migrations/2026_01_02_231438_add_request_context_to_coupon_redemptions_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('coupon_redemptions', function (Blueprint $table) {
+            $table->string('ip_address', 45)->nullable()->after('failure_reason');
+            $table->string('device_id', 64)->nullable()->after('ip_address');
+            $table->text('user_agent')->nullable()->after('device_id');
+
+            $table->index(['ip_address', 'created_at'], 'coupon_redemptions_ip_time_idx');
+            $table->index(['device_id', 'created_at'], 'coupon_redemptions_device_time_idx');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('coupon_redemptions', function (Blueprint $table) {
+            $table->dropIndex('coupon_redemptions_ip_time_idx');
+            $table->dropIndex('coupon_redemptions_device_time_idx');
+            $table->dropColumn(['user_agent', 'device_id', 'ip_address']);
+        });
+    }
+};