What results-related docs can be obtained from Cambridge after the results came in?

AS History 9489 here.
So we got the first mail on 11th with the Electronic Statement of Results containing result and PUM score. Then second mail with the Component Marks Report (blue header) with Syllabus total mark and syllabus grade. Third mail with the transcripts containing actual scans of the answer papers with some weird machine/AI? comments like "chall" or "L2, L3", "supp+chall identified".

- is there any additional document that we can request to understand how the teacher/marker graded the answers?
- are the papers actually graded by AI or human teachers?!
- is there a marking/answer scheme to understand what points are awarded/taken away for what?

Weird thing i noticed, i think the candidate mixed up question with part in the left-side boxes, so instead of 1a he wrote a1. He answered 1a, 1b, 2a, 2b (written like a1, a2, b1, b2...) but no marks awarded, instead the marks were given for Q3 a and b. Very weird.

Paper 1 definitely is worth a re-mark attempt, how is this done? Will an actual human examiner/teacher grade this?