Save transkribus ID for each transcription as metadata
A new metadata named transkribus_id should be created by the transkribus import using TextLine.id attribute.
Refs and example in https://gitlab.com/arkindex/requests/-/issues/540
A new metadata named transkribus_id should be created by the transkribus import using TextLine.id attribute.
Refs and example in https://gitlab.com/arkindex/requests/-/issues/540