Change default write disposition to append
What does this merge request do and why?
This MR changes the default write disposition from truncate (i.e. overwrite/replace) with append to reduce the chance of accidentally deleting data.
Relates to #469 (closed)
How to set up and validate locally
Numbered steps to set up and validate the change are strongly suggested.
Merge request checklist
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I've ran the affected pipeline(s) to validate that nothing is broken. -
Tests added for new functionality. If not, please raise an issue to follow up. -
Documentation added/updated, if needed.