Portiere PHP-Cronjobs auf Spring-Tasks und ergänze Legacy-Tests

Migriert die weiterhin benötigten Zeitaufgaben einschließlich SOAP-Importen, Betriebsstatus und Wiederanlaufkontrolle. Aktiviert 115 native Spring-Tasks im Docker-Image ohne Cron-Daemon oder PHP und dokumentiert die entfallenen HHA-Aufrufe. Ergänzt PHP-/UI-Testwerkzeuge und aktualisiert den Projektstand auf Version 0.2.0.

legacy-php-tests/tests/CalendarTest.php

@@ -0,0 +1,71 @@
+<?php
+
+use PHPUnit\Framework\Attributes\DataProvider;
+
+final class CalendarTest extends LegacyTestCase
+{
+    #[DataProvider('leapYears')]
+    public function testGregorianLeapYears(int $year, bool $expected): void
+    {
+        self::assertSame($expected, leapYear($year));
+    }
+
+    public static function leapYears(): array
+    {
+        return ['ordinary' => [2026, false], 'leap' => [2024, true],
+            'century exception' => [1900, false], '400 years' => [2000, true],
+            'future century' => [2100, false]];
+    }
+
+    #[DataProvider('monthLengths')]
+    public function testMonthLength(int $year, int $month, int $expected): void
+    {
+        self::assertSame($expected, daysPerMonth($year, $month));
+    }
+
+    public static function monthLengths(): array
+    {
+        return [[2026, 1, 31], [2026, 2, 28], [2024, 2, 29], [1900, 2, 28],
+            [2000, 2, 29], [2026, 4, 30], [2026, 12, 31]];
+    }
+
+    #[DataProvider('dayOffsets')]
+    public function testDayArithmeticProducesValidCalendarDates(array $date, int $offset, array $expected): void
+    {
+        $actual = addDaysComplete(...[...$date, $offset]);
+        self::assertSame($expected, $actual);
+        self::assertTrue(checkdate($actual[1], $actual[2], $actual[0]));
+    }
+
+    public static function dayOffsets(): array
+    {
+        return [
+            'unchanged' => [[2026, 10, 26], 0, [2026, 10, 26]],
+            'next day' => [[2026, 10, 26], 1, [2026, 10, 27]],
+            'year rollover' => [[2026, 12, 31], 1, [2027, 1, 1]],
+            'February non-leap' => [[2026, 2, 28], 1, [2026, 3, 1]],
+            'February leap' => [[2024, 2, 28], 1, [2024, 2, 29]],
+            'leap rollover' => [[2024, 2, 29], 1, [2024, 3, 1]],
+            'multiple months' => [[2026, 1, 31], 60, [2026, 4, 1]],
+            'previous day same month' => [[2026, 10, 26], -1, [2026, 10, 25]],
+            'previous year' => [[2026, 1, 1], -1, [2025, 12, 31]],
+            'backwards into February' => [[2026, 3, 1], -1, [2026, 2, 28]],
+            'backwards into leap February' => [[2024, 3, 1], -1, [2024, 2, 29]],
+            'backwards into 30-day month' => [[2026, 5, 1], -1, [2026, 4, 30]],
+            'backwards from short month' => [[2026, 4, 1], -1, [2026, 3, 31]],
+        ];
+    }
+
+    #[DataProvider('monthOffsets')]
+    public function testMonthArithmetic(int $year, int $month, int $offset, array $expected): void
+    {
+        self::assertSame($expected, addMonths($year, $month, $offset));
+    }
+
+    public static function monthOffsets(): array
+    {
+        return [[2026, 1, 0, [2026, 1]], [2026, 12, 1, [2027, 1]],
+            [2026, 1, -1, [2025, 12]], [2026, 1, 25, [2028, 2]],
+            [2026, 1, -13, [2024, 12]]];
+    }
+}