I just happened upon this service that offers schedules in raw data format to be imported into various different database forms. They have various subscription models depending on how often you want updated schedules with bi-annually being the cheapest at 15 euro per 6 months or 28.50 for a whole years worth of updates.
https://virtualairlineschedules.net/ is the website. I would be willing to donate the first update as a trial run or whatever. Maybe it would save some people a lot of time and extra work.