Phase 5: reporting, exports, pronouns, and roster freshness

Instructor participation report: per-student histograms, outcome mix
by class day, and a sortable table including the fairness ratio
(answered calls over questions present for, with opt-out days out of
the denominator), plus CSV exports of students, calls, and opt-outs.

Assessment scales are now per-course data: ordered levels with labels
and points out of 100 (defaults carry the old R grading values), with
calls referencing levels by id so renames follow through to history.
Renaming, re-pointing, reordering, and adding levels are always
allowed; deleting a level in use by recorded calls is blocked.

Pronouns and course term dates come from Canvas custom variable
substitutions, at launch and roster-wide via rlid-scoped NRPS; the
student page notes that names/pronouns are Canvas-sourced. Rosters
can also be refreshed outside launches: a "Sync roster now" button
and a sync-rosters CLI command for an hourly cron job, skipping ended
courses. Alembic now runs SQLite-compatible batch migrations with a
constraint naming convention.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_student_ui.py

@@ -3,6 +3,8 @@ import re
 
 import pytest
 
+from conftest import outcome_actions
+
 TODAY = datetime.date.today()
 
 
@@ -97,7 +99,8 @@ def test_assessment_visibility_setting(student):
         call_id = re.search(r"/instructor/call/(\d+)/outcome", page).group(1)
         target = "Ada Lovelace" in page
         student.post(
-            f"/instructor/call/{call_id}/outcome", data={"action": "POOR"}
+            f"/instructor/call/{call_id}/outcome",
+            data={"action": outcome_actions(page)["POOR"]},
         )
         if target:
             break