fixup! feat: Add X-NC-Disable-Scheduling property to allow skipping s…

…cheduling

Signed-off-by: SebastianKrupinski <[email protected]>

apps/dav/lib/CalDAV/Schedule/IMipPlugin.php

@@ -97,6 +97,7 @@ public function beforeWriteContent($uri, INode $node, $data, $modified): void {
 	public function schedule(Message $iTipMessage) {
 
 		// do not send imip messages if external system already did
+		/** @psalm-suppress UndefinedPropertyFetch */
 		if ($iTipMessage->message?->VEVENT?->{'X-NC-DISABLE-SCHEDULING'}?->getValue() === 'true') {
 			if (!$iTipMessage->scheduleStatus) {
 				$iTipMessage->scheduleStatus = '1.0;We got the message, but iMip message are disabled for this event';