Scope/Technical Review of annotations/grading LMS work

### Problem:

We've discussed adding the ability to view a student's annotations, and the ability to grade those annotations to the current scope of work for the LMS app. The business rationale for this is to create a full end-to-end app that would give teachers and students a complete user experience now, instead of waiting for LMS development to pick up again in the future.

User stories for this work have been outlined [here](https://docs.google.com/document/d/1JYor8MSpQZI_DrOHAv0VBdJT_qADubRS2YwJYP68kcY/edit#)

### Acceptance Criteria for this card:
- [ ] Assess the user stories and determine the technical scope of work required to implement
- [ ] Determine a rough timeline for completion of this phase of work

Start with the linked user stories and compare the requested annotation viewing and grading capabilities with the current LMS scope. Document the technical work required for this phase and provide a rough completion timeline; no files or tests are identified in the issue.

Written by the indexing model from the issue text.