feat: implement reports

src/data/canvas.rs

@@ -325,6 +325,10 @@ pub fn ingest(
                 assessment_id: ctx.assessment_id.clone(),
                 date: ctx.date,
                 form: ctx.form.clone(),
+                // Canvas numbers questions as the record does, and its exports
+                // carry no printed order, so there is no printed position to
+                // record and no letter map to decode against.
+                form_position: None,
                 student_key: student_key.clone(),
                 sid: sid.clone(),
                 name: name.clone(),
@@ -334,7 +338,9 @@ pub fn ingest(
                 item_ref,
                 item_version: None,
                 selected,
+                selected_source: Vec::new(),
                 eliminated: Vec::new(),
+                eliminated_source: Vec::new(),
                 correct,
                 credit,
                 points_possible: points,