Added mail to inform users about still running time entries

database/migrations/2024_07_18_080906_add_still_active_email_sent_at_to_time_entries_table.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+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('time_entries', function (Blueprint $table) {
+            $table->dateTime('still_active_email_sent_at')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('time_entries', function (Blueprint $table) {
+            $table->dropColumn('still_active_email_sent_at');
+        });
+    }
+};