🔊(backend) add some log to trace conversion made on docs creation

We added logs on the conversion made when a doc is created.

src/backend/core/api/viewsets.py

@@ -693,7 +693,9 @@ class DocumentViewSet(
                 )
                 serializer.validated_data["content"] = converted_content
                 serializer.validated_data["title"] = uploaded_file.name
+                logger.info("conversion ended successfully")
             except ConversionError as err:
+                logger.error("could not convert file content with error: %s", err)
                 raise drf.exceptions.ValidationError(
                     {"file": ["Could not convert file content"]}
                 ) from err

src/backend/core/services/converter_services.py

@@ -45,6 +45,8 @@ class Converter:
     def convert(self, data, content_type, accept):
         """Convert input into other formats using external microservices."""
 
+        logger.info("converting content from %s to %s", content_type, accept)
+
         if content_type == mime_types.DOCX and accept == mime_types.YJS:
             blocknote_data = self.docspec.convert(
                 data, mime_types.DOCX, mime_types.BLOCKNOTE