Security feature: Block repetitive submissions

[zepich]

If a bad actor submits the same data in the form over and over again, mosparo does not block it. The same form data usually is not submitted multiple times in the same form. The idea is to add an additional security feature that can be enabled for a project. If enabled, mosparo will block a submission if the same submission was already submitted before (within the stored submissions).

Required features

• Add the additional security feature in the security settings of a project, with the option to define how many of the same submissions were allowed and in which time frame the check should be done (for example, same submission in one day).
• Add the additional security feature in the project creation wizard
• If enabled, check the stored submissions for the same form signature for other submit tokens in the verification API call (the same submit token can create multiple submissions, which are okay).

Suggested by

• @Geremia

Origin

Issue #168