Added migration to add created_by to items table

database/migrations/2026_08_03_146000_add_created_by_to_order_items.php

@@ -0,0 +1,46 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+/**
+ * Adds per-line authorship to order_items. Order.created_by records
+ * who opened the transaction, but a single Order can accumulate lines
+ * from multiple operators over time (Alice has Order-42 with two lines,
+ * Bob later replenishes under the same Order-42 with three more). Storing
+ * created_by on the OrderItem itself preserves that per-line context.
+ *
+ * Nullable so historical rows written before this migration back-fill
+ * from the parent Order.created_by, and so admins clearing themselves
+ * out (soft-delete workflow) don't cascade into false authorship.
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('order_items', function (Blueprint $table) {
+            $table->unsignedBigInteger('created_by')->nullable()->after('price');
+            $table->index('created_by');
+        });
+
+        // Backfill existing rows from the parent Order.created_by so
+        // history-tab renders and reports don't show a null column for
+        // every pre-migration line.
+        DB::statement('
+            UPDATE order_items
+            JOIN orders ON orders.id = order_items.order_id
+            SET order_items.created_by = orders.created_by
+            WHERE order_items.created_by IS NULL
+        ');
+    }
+
+    public function down(): void
+    {
+        Schema::table('order_items', function (Blueprint $table) {
+            $table->dropIndex(['created_by']);
+            $table->dropColumn('created_by');
+        });
+    }
+};