Delete multiple documents by ID in parallel. Errors per document are captured in the response but do not interrupt other deletions.
Example response: [{"a1b2c3d4-e5f6-7890-abcd-ef1234567890": {"status": "deleted"}}, {"b2c3d4e5-f6a7-8901-bcde-f12345678901": {"status": "error", "message": "failed to delete S3 files"}}]