fix: enforce non-null file status contract

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

lib/Db/File.php

@@ -53,7 +53,7 @@ class File extends Entity {
 	protected string $uuid = '';
 	protected ?\DateTime $createdAt = null;
 	protected string $name = '';
-	protected ?int $status = null;
+	protected ?int $status = FileStatus::DRAFT->value;
 	protected ?string $userId = null;
 	protected ?int $signedNodeId = null;
 	protected ?string $signedHash = null;
@@ -100,7 +100,20 @@ public function getUserId(): string {
 	}
 
 	public function getStatusEnum(): FileStatus {
-		return FileStatus::from($this->status ?? FileStatus::DRAFT->value);
+		return FileStatus::from($this->getStatus());
+	}
+
+	public function getStatus(): int {
+		return $this->status ?? FileStatus::DRAFT->value;
+	}
+
+	public function setStatus(int $status): void {
+		if (FileStatus::tryFrom($status) === null) {
+			throw new \InvalidArgumentException(sprintf('Invalid file status code: %d', $status));
+		}
+
+		$this->status = $status;
+		$this->markFieldUpdated('status');
 	}
 
 	public function setStatusEnum(FileStatus $status): void {