A schedule per location, and locations backed up one after the other

Off, once a day or every N hours from a time, each in its own time zone. Existing locations
keep the time that held for all of them. A backup that has to wait shows as queued, and its
restore point has the time it really began.

lib/Migration/Version000008Date20261107010000.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+// SPDX-FileCopyrightText: 2026 Dillard Blom
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+namespace OCA\NgBackup\Migration;
+
+use Closure;
+use OCA\NgBackup\Service\LocationSchedule;
+use OCA\NgBackup\Service\Schedule;
+use OCP\DB\ISchemaWrapper;
+use OCP\DB\Types;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\SimpleMigrationStep;
+
+/** A schedule per location. Each existing location gets the daily time that held for all of them. */
+final class Version000008Date20261107010000 extends SimpleMigrationStep {
+	public function __construct(
+		private IDBConnection $db,
+		private Schedule $schedule,
+	) {
+	}
+
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+		$t = $schema->getTable('ngb_targets');
+		if ($t->hasColumn('schedule')) {
+			return null;
+		}
+		$t->addColumn('schedule', Types::STRING, ['notnull' => false, 'length' => 16]);
+		$t->addColumn('schedule_zone', Types::STRING, ['notnull' => false, 'length' => 64]);
+		$t->addColumn('schedule_since', Types::BIGINT, ['notnull' => false, 'unsigned' => true]);
+		return $schema;
+	}
+
+	public function postSchemaChange(IOutput $output, Closure $schemaClosure, array $options): void {
+		['time' => $time, 'timezone' => $zone] = $this->schedule->get();
+		$qb = $this->db->getQueryBuilder();
+		$qb->update('ngb_targets')
+			->set('schedule', $qb->createNamedParameter(Schedule::validTime($time) ? LocationSchedule::normalize($time) : ''))
+			->set('schedule_zone', $qb->createNamedParameter($zone))
+			->where($qb->expr()->isNull('schedule'));
+		$qb->executeStatement();
+	}
+}