Split concerns into services

database/migrations/2025_08_14_000001_add_indexes_to_collections_table.php

@@ -0,0 +1,25 @@
+<?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('collections', function (Blueprint $table) {
+            // Create composite index for (groups_id, added) used by stuck-collection cleanup.
+            $table->index(['groups_id', 'added'], 'collections_groups_added_idx');
+            // Create index for dateadded used by old-collection cleanup.
+            $table->index(['dateadded'], 'collections_dateadded_idx');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('collections', function (Blueprint $table) {
+            $table->dropIndex('collections_groups_added_idx');
+            $table->dropIndex('collections_dateadded_idx');
+        });
+    }
+};