[Bug]: missing argument when deleting documents

```
38 def deleteDocument(self, sourceId: str, documentId: str):
---> 39 return self.client.deleteDocument(sourceId, documentId)

TypeError: PlatformClient.deleteDocument() missing 1 required positional argument: 'deleteChildren'
```

Start with the deleteDocument wrapper shown in the traceback and inspect the signature and callers of PlatformClient.deleteDocument. Confirm how the deleteChildren argument should be handled, then verify that deleting a document no longer raises the missing-argument TypeError.

Written by the indexing model from the issue text.