fix: reapply exercise updated_by backfill

gradesa/data/migrations/00054_reapply_exercise_updated_by_backfill.sql

@@ -0,0 +1,37 @@
+-- Re-apply exercise updated_by backfill in a new migration.
+-- This is intentionally idempotent and safe to run multiple times.
+-- It addresses environments where earlier backfill migration content differed
+-- but migration version 00052 is already marked as applied.
+
+UPDATE exercises
+SET updated_by = created_by
+WHERE updated_by IS NULL
+  AND created_by IS NOT NULL;
+
+UPDATE exercises e
+SET updated_by = de.created_by
+FROM dnd_exercises de
+WHERE e.id = de.exercise_id
+  AND e.updated_by IS NULL
+  AND de.created_by IS NOT NULL;
+
+UPDATE exercises e
+SET updated_by = dme.created_by
+FROM dnd_match_exercises dme
+WHERE e.id = dme.exercise_id
+  AND e.updated_by IS NULL
+  AND dme.created_by IS NOT NULL;
+
+UPDATE exercises e
+SET updated_by = mge.created_by
+FROM memory_game_exercises mge
+WHERE e.id = mge.exercise_id
+  AND e.updated_by IS NULL
+  AND mge.created_by IS NOT NULL;
+
+UPDATE exercises e
+SET updated_by = jse.created_by
+FROM jumbled_sentence_exercises jse
+WHERE e.id = jse.exercise_id
+  AND e.updated_by IS NULL
+  AND jse.created_by IS NOT NULL;

gradesa/test-results/.last-run.json

@@ -1,4 +1,11 @@
 {
   "status": "failed",
-  "failedTests": []
+  "failedTests": [
+    "18e1443b7169cebccd21-4a0da125f055d790cf05",
+    "cf4ffee829137744e3cd-e6406448e73a28c0ddd9",
+    "d936625e1207b3e19d4b-67eb4c2dd9e8efb88e3d",
+    "d8918302922cfb4b5ab2-53975d1f9ee0854667fa",
+    "d8918302922cfb4b5ab2-fdd621e8f42178e15eb4",
+    "d8918302922cfb4b5ab2-ae27decdc4c0ad5570ee"
+  ]
 }