[FEATURE] Add PHP mutation testing with Infection

Is your feature request related to a problem? Please describe. The user who is requesting a document to be signed would be the best person to send the email to the person signing as they will have already received emails from that user and therefore less likely to end up in junk.…

What problem are you trying to solve with Submitty When grading with "Clustering Mode" enabled, grading one student automatically grades everyone else in their cluster simultaneously. However, pressing the "Next Student" arrow button (or using the keyboard hotkeys) currently…

What problem are you trying to solve with Submitty The registration date feature introduced in PR #13011 currently does not have Cypress end-to-end test coverage. Describe the way you'd like to solve this problem Adding end-to-end testing that matches the registration date…

I have found that if a payload contains a date-time with more than 6 fractional seconds it will fail validation. Issue seems to stem from the fact that PHP DateTime will only allow 6 digits and fail after that. Could it truncate the fractional seconds to 6 digits before parsing…