Included a new method `exists` to handle existence checks for StoredObject or StoredObjectVersion within WebdavControllerTest. This method currently always returns true, ensuring initial compatibility and providing a foundation for future logic refinements.
The WebdavController has been updated to flush the EntityManager after writing a document, while its tests have been adjusted correspondingly. A new test for the document PUT operation has also been added, which ensures the EntityManager flushes and the StoredObjectManager writes to this document.
The controller is tested from real request scraped from apache mod_dav implementation. The requests were scraped using a wireshark-like tool. Those requests have been adapted to suit to our xml.