initial commit

backend/migrations/00004_question_reference_answer.sql

@@ -0,0 +1,13 @@
+-- +goose Up
+ALTER TABLE questions
+    ADD COLUMN reference_answer TEXT NOT NULL DEFAULT '';
+
+UPDATE questions
+SET reference_answer = CASE
+    WHEN type = 'open' THEN 'Use context cancellation, stop accepting work, drain active requests, and close dependencies within a deadline.'
+    WHEN type = 'code_review' THEN 'Identify unstable dependencies or state updates that cause avoidable renders and propose memoization only where measured.'
+    ELSE reference_answer
+END;
+
+-- +goose Down
+ALTER TABLE questions DROP COLUMN reference_answer;