feat: add VTT file support to Document Extractor (#11148)

api/core/workflow/nodes/document_extractor/node.py

@@ -113,7 +113,7 @@ def _extract_text_by_mime_type(*, file_content: bytes, mime_type: str) -> str:
 def _extract_text_by_file_extension(*, file_content: bytes, file_extension: str) -> str:
     """Extract text from a file based on its file extension."""
     match file_extension:
-        case ".txt" | ".markdown" | ".md" | ".html" | ".htm" | ".xml":
+        case ".txt" | ".markdown" | ".md" | ".html" | ".htm" | ".xml" | ".vtt":
             return _extract_text_from_plain_text(file_content)
         case ".json":
             return _extract_text_from_json(file_content)