Submissions can be purged immediately after submission

Problem/Motivation

If these specific purge settings are used, submissions can be purged immediately after submission.

Steps to reproduce

• Create a webform
• Enable drafts
• Enable submission purging of Completed submissions only

Now a user performs this submission flow:

• Start a submission
• Saves draft
• Leaves draft for longer than purge_days value
• Returns and submits draft

Now the submission is immediately deleted when cron runs. This is because the created column is used when querying submissions to purge.

Proposed resolution

https://git.drupalcode.org/project/webform/-/blob/6.2.x/src/WebformSubmi...

Update the purge logic so that for Completed submissions, the query instead looks at the submitted timestamp. Draft submissions should still query the created timestamp.