Unified API response json schema (#3170)

feat: change all file names to lowercase #1574 (#1575)

fix: remove Top K in retrieval testing #770 and if the document parsing fails, the error message returned by the backend is displayed (#782)

feat: delete the added model #503 and display an error message when the requested file fails to parse #684 (#708)

fix: by obtaining the width and height of the pdf and passing it to b… (#151)

feat: set local path of workerSrc to PdfLoader (#101)

feat: add DocumentPreviewer for chunk of chat reference and remove duplicate \n from record.progress_msg (#97)