chore(test): text with contexts

[max-nextcloud]

No description provided.

[blizzz]

AttachmentResolver needs to be adjusted yet, according to Claude:

1. Collectives renders preview/print through window.OCA.Text.createEditor({ fileId, useSession: false }) (src/composables/useReader.ts:118) → Text's MarkdownContentEditor, which does new AttachmentResolver({ fileId }).
2. AttachmentResolver (unchanged on the branch) POSTs { documentId: } to /apps/text/attachments.
3. Old middleware read that param as a file id: $fileId = (int)$request->getParam('documentId') → FileService::getDocumentIdForUser($fileId, $userId).
4. New middleware (SessionMiddleware::assertUserOrShareToken) treats it as a primary key: documentService->getDocument($documentId), and bails out with InvalidSessionException → HTTP 403 when it's null.
5. Document ids are now snowflakes, so that lookup can never succeed with a file id.

[mejo-]

@max-nextcloud I guess this PR can be closed, right?