Rebuild DEEG as a fifth installation, add stepped forms and a plugin system, and clear the review backlog

Forms gained steps, conditions, image choices, number fields with units and a
summary step; the DEEG price finder uses all of it. Plugins are manifest plus
Twig: blocks, settings, containers, routes, presets and theme packs, switched
per installation. The review backlog is done: archive pages render through the
normal page pipeline, forms and post lists work inside areas and sections,
repeated sections get their own ids, breakpoints and colours come from the
palette, backup and update work on MySQL and lock each other out.

The task worker no longer shortens a process that has no time limit:
set_time_limit() sets the limit instead of extending it, which turned an
unlimited CLI run into eighty seconds and killed the full test suite far away
from the scheduler.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/SchedulerTest.php

@@ -2,10 +2,16 @@
 
 namespace App\Tests;
 
+use App\EventSubscriber\InstallSubscriber;
+use App\EventSubscriber\TaskWorkerSubscriber;
 use App\Infrastructure\ConnectionFactory;
 use App\Ops\Scheduler;
 use Doctrine\DBAL\Connection;
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Event\TerminateEvent;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
 
 /**
  * Der Aufgabenplan - und zwar die Eigenschaften, an denen er auf einem echten Hosting scheitern
@@ -256,4 +262,32 @@ final class SchedulerTest extends TestCase
         self::assertNotSame($one, $two);
         self::assertSame($one, Scheduler::cronToken('geheimnis-eins'));
     }
+
+    public function testTheWorkerNeverShortensAProcessWithoutATimeLimit(): void
+    {
+        // `set_time_limit()` setzt, es verlaengert nicht. Auf einem Prozess ohne Grenze - Konsole,
+        // Testlauf, Hoster mit max_execution_time = 0 - machte der Worker aus "unbegrenzt"
+        // achtzig Sekunden, und danach starb der Prozess irgendwo weit weg von den Aufgaben.
+        $vorher = ini_get('max_execution_time');
+        ini_set('max_execution_time', '0');
+        file_put_contents($this->projectDir.'/'.InstallSubscriber::MARKER, 'test
+');
+        $task = new SpyTask('a');
+        $scheduler = $this->scheduler([$task]);
+        $scheduler->sync();
+        $this->makeDue('a');
+        // Die Zustandsdatei kennt den alten Zeitpunkt; ohne sie fragt der naechste Aufruf die Datenbank.
+        @unlink($this->projectDir.'/'.Scheduler::STATE_FILE);
+
+        $subscriber = new TaskWorkerSubscriber($scheduler, $this->projectDir, 'admin');
+        $subscriber->onTerminate(new TerminateEvent(
+            $this->createMock(HttpKernelInterface::class),
+            Request::create('/'),
+            new Response(),
+        ));
+
+        self::assertSame(1, $task->runs, 'Die faellige Aufgabe soll gelaufen sein.');
+        self::assertSame('0', (string) ini_get('max_execution_time'), 'Ohne Grenze bleibt ohne Grenze.');
+        ini_set('max_execution_time', (string) $vorher);
+    }
 }