Merge pull request #13698 from nextcloud/backport/13696/stable31

[stable31] fix(AI): list more limitations to the context chat docs

Author: kyteinsky

admin_manual/ai/app_context_chat.rst

@@ -231,3 +231,5 @@ Known Limitations
 * Customer support is available upon request, however we can't solve false or problematic output, most performance issues, or other problems caused by the underlying model. Support is thus limited only to bugs directly caused by the implementation of the app (connectors, API, front-end, AppAPI).
 * Large files are not supported in "Selective context" in the Assistant UI if they have not been indexed before. Use ``occ context_chat:scan <user_id> -d <directory_path>`` to index the desired directory synchronously and then use the Selective context option. "Large files" could mean differently for different users. It depends on the amount of text inside the documents in question and the hardware on which the indexer is running. Generally 20 MB should be large for a CPU-backed setup and 100 MB for a GPU-backed system.
 * Password protected PDFs or any other files are not supported. There will be error logs mentioning cryptography and AES in the docker container when such files are encountered but it is nothing to worry about, they will be simply ignored and the system will continue to function normally.
+* Podman and Kubernetes are currently not supported for the Context Chat Backend ExApp.
+* External storages (through ``files_external``) may not work as well as the local storage.