So trying to figure out something, trying to build out a document and index store. I have various transcription files (personal journals, work meetings, tutorials), and I want to build a pipeline to get these docs into the proper indexes. I extended the Document class to add file metadata and hashes, and I want to summarize the document before it is indexed. First off, is this something I need to call the LLM directly for, or is there some functionality within the indexer I'm forgetting?