Fix an agent bug if a process ran more than 999 days (#15411)

* Fix an agent bug if a process ran more than 999 days
Increase it to 274 years before that happens ;)
Fix a few other small bugs

* Update schema check file

database/migrations/2023_10_07_170735_increase_processes_cputime_length.php

@@ -0,0 +1,28 @@
+<?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('processes', function (Blueprint $table) {
+            $table->string('cputime', 14)->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('processes', function (Blueprint $table) {
+            $table->string('cputime', 12)->change();
+        });
+    }
+};