fix(webhooks): improve Nextcloud 33 compatibility and HA REST notify payload handling

- Replace getFolder() with get() and fallback creation to fix LazyFolder compatibility in NC33
- Add support for unwrapping nested 'data' keys in Home Assistant REST notify payloads
- Implement fallback to $_GET when request body is empty
- Refactor buildRichObject to use direct PDO queries for filecache and share creation, bypassing lazy node resolution
- Generate timestamped filenames for uploaded images to prevent overwrites
- Add comprehensive logging for webhook payloads, image processing, and filecache verification
- Update IShareManager imports and usage to align with Nextcloud API changes
- Improve image attachment handling to support URLs, base64, and file paths
- Wrap image processing in try-catch to prevent webhook crashes on image failures

lib/Cron/ImageCleanup.php

@@ -35,9 +35,14 @@ class ImageCleanup implements IJob {
         }
 
         // Check if images directory exists
+        // LazyFolder in Nextcloud 33 doesn't delegate getFolder() properly
         try {
             $userFolder = $this->rootFolder->getUserFolder($bot->getUID());
-            $imagesDir = $userFolder->getFolder('nc_bot_webhooks-images');
+            try {
+                $userFolder->get('nc_bot_webhooks-images');
+            } catch (\OCP\Files\NotFoundException $e) {
+                return;
+            }
         } catch (\Exception $e) {
             return;
         }