new table: student_progress_hist

enrolment_idstr             | integer                  | not null
 incomplete_grade        | integer                  |
complete_grade           | integer
 assessments_required    | integer                  |
 assessments_attempted   | integer                  |
 iscompleteable          | integer (length 1, default 0)
 percent_complete        | integer                  |
 funding_percent_complete | integer
 points_course_possible  | integer                  |
 points_attempted        | integer                  |
 points_earned           | integer                  |
 datecreated             | integer (huge, unsigned, etc.)

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new table: assessment_grade

enrolment_idstr
assessmentid (FK to mdl_assessment.id)
pts_earned
excluded (boolean int)
timefinish integer (huge, unsigned, etc.)
datecreated integer (huge, unsigned, etc.)