Features/lms sprint 33/lms 3734 development exclude self matching assignments

[safac1]

• Support the new selfMatchExcluded section in the completed webhook response, which contains results automatically excluded because they were submitted by the same student to another assignment in the same course
• Self-match results are merged into the main results arrays and auto-added to the excluded list on load, so they appear in the "Excluded Matching Results" dialog
• Each self-match result gets a "Self-Match" chip with a tooltip explaining the exclusion reason
• Student name is displayed next to the chip; falls back to "Anonymous" when the author is not available
• Users can manually include a self-match result back into the report — the score updates accordingly and the Self-Match label is preserved on the result card