* created method to fetch incomplete submissions
* added new field 'updated_at' to submission schema
* Revert "created method to fetch incomplete submissions"
This reverts commit 15c65236e7.
* added logic to cleanup redundant incomplete submissions
* logic improvements and spec
* simplified the cleanup logic
* simplified the logic further
* early return to improve performance
* consolidated cleanup logic
* perform cleanup in wizard.update
* fixed issue
* minor fix
* use consistent naming
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