Add initial infrastructure for importing online tickets
This still needs to be generalized on the request side, so far this only has DB and SNCF hardcoded. The response side goes through the itineary extractor and thus doesn't have this problem.
This still needs to be generalized on the request side, so far this only has DB and SNCF hardcoded. The response side goes through the itineary extractor and thus doesn't have this problem.