langchain

6a8f8a56 - community[patch]: added content_columns option to CSVLoader (#23809)

community[patch]: added content_columns option to CSVLoader (#23809) **Description:** Adding a new option to the CSVLoader that allows us to implicitly specify the columns that are used for generating the Document content. Currently these are implicitly set as "all fields not part of the metadata_columns". In some cases however it is useful to have a field both as a metadata and as part of the document content.