Add Deck workflow automation Nextcloud app

Ports the standalone due-date cron script into a proper Nextcloud 34
app with a personal-settings UI, per-user workflow configuration
(source/target stack, assigned-user and label filters, email
notification), a TimedJob background runner, and Gitea CI pipelines.

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

lib/Db/Workflow.php

@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\WorkflowDeckAutomation\Db;
+
+use OCP\AppFramework\Db\Entity;
+use OCP\DB\Types;
+
+/**
+ * @method string getUserId()
+ * @method void setUserId(string $userId)
+ * @method string getTitle()
+ * @method void setTitle(string $title)
+ * @method int getBoardId()
+ * @method void setBoardId(int $boardId)
+ * @method int getSourceStackId()
+ * @method void setSourceStackId(int $sourceStackId)
+ * @method int getTargetStackId()
+ * @method void setTargetStackId(int $targetStackId)
+ * @method string|null getFilterUserIds()
+ * @method void setFilterUserIds(?string $filterUserIds)
+ * @method string|null getFilterLabelIds()
+ * @method void setFilterLabelIds(?string $filterLabelIds)
+ * @method bool getNotifyEmail()
+ * @method void setNotifyEmail(bool $notifyEmail)
+ * @method bool getEnabled()
+ * @method void setEnabled(bool $enabled)
+ * @method \DateTime|null getLastRun()
+ * @method void setLastRun(?\DateTime $lastRun)
+ */
+class Workflow extends Entity implements \JsonSerializable {
+	protected $userId;
+	protected $title;
+	protected $boardId;
+	protected $sourceStackId;
+	protected $targetStackId;
+	protected $filterUserIds;
+	protected $filterLabelIds;
+	protected $notifyEmail;
+	protected $enabled;
+	protected $lastRun;
+
+	public function __construct() {
+		$this->addType('id', Types::INTEGER);
+		$this->addType('userId', Types::STRING);
+		$this->addType('title', Types::STRING);
+		$this->addType('boardId', Types::INTEGER);
+		$this->addType('sourceStackId', Types::INTEGER);
+		$this->addType('targetStackId', Types::INTEGER);
+		$this->addType('filterUserIds', Types::STRING);
+		$this->addType('filterLabelIds', Types::STRING);
+		$this->addType('notifyEmail', Types::BOOLEAN);
+		$this->addType('enabled', Types::BOOLEAN);
+		$this->addType('lastRun', Types::DATETIME);
+	}
+
+	/**
+	 * @return string[]
+	 */
+	public function getFilterUserIdsArray(): array {
+		return $this->decodeIds($this->getFilterUserIds());
+	}
+
+	/**
+	 * @return int[]
+	 */
+	public function getFilterLabelIdsArray(): array {
+		return array_map('intval', $this->decodeIds($this->getFilterLabelIds()));
+	}
+
+	/**
+	 * @return string[]
+	 */
+	private function decodeIds(?string $json): array {
+		if ($json === null || $json === '') {
+			return [];
+		}
+		$decoded = json_decode($json, true);
+		return is_array($decoded) ? array_values($decoded) : [];
+	}
+
+	public function jsonSerialize(): array {
+		return [
+			'id' => $this->getId(),
+			'userId' => $this->getUserId(),
+			'title' => $this->getTitle(),
+			'boardId' => $this->getBoardId(),
+			'sourceStackId' => $this->getSourceStackId(),
+			'targetStackId' => $this->getTargetStackId(),
+			'filterUserIds' => $this->getFilterUserIdsArray(),
+			'filterLabelIds' => $this->getFilterLabelIdsArray(),
+			'notifyEmail' => (bool)$this->getNotifyEmail(),
+			'enabled' => (bool)$this->getEnabled(),
+			'lastRun' => $this->getLastRun()?->format(\DateTimeInterface::ATOM),
+		];
+	}
+}