@Mathias Opland Welcome to Microsoft Q&A forum and thanks for reaching out here.
- Regarding CDC feature in mapping data flow: Yes, it is limited to Parquet and other data sources called out in this documentation: https://learn.microsoft.com/en-us/azure/data-factory/concepts-change-data-capture. ASFAIK it is not in the roadmap at this point, I recommend submitting feedback in User voice forum here: https://feedback.azure.com/d365community/forum/9b9ba8e4-0825-ec11-b6e6-000d3a4f07b8 Please do share the feedback link once it is posted so that others with similar idea can upvote and comment on your feedback to help increase the priority of the feature request.
- Regarding the checkpoint key question w.r.t GIT enabled workspace - As per my conversation with Product team, Checkpoint key is just a key, which is used to store the value in ADF backend, whereas checkpoint marker is stored as value against that key. Unless key is not changed by user/customer, things are supposed to work.
Hope this info helps.
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