Revert "db: squash migrations"

This reverts commit d010531ef7.

supabase/migrations/20241223012712_validate_mark_as_complete.sql

@@ -0,0 +1,18 @@
+set check_function_bodies = off;
+
+CREATE OR REPLACE FUNCTION public.check_if_student_completed_exercises(lesson_id_arg uuid, groupmember_id_arg uuid)
+ RETURNS boolean
+ LANGUAGE plpgsql
+AS $function$
+DECLARE
+    all_exercises_exist boolean;
+BEGIN
+    SELECT COUNT(*) = COUNT(s.id) INTO all_exercises_exist
+    FROM exercise e
+    LEFT JOIN submission s ON e.id = s.exercise_id AND s.submitted_by = groupmember_id_arg
+    WHERE e.lesson_id = lesson_id_arg;
+
+    RETURN all_exercises_exist;
+END;
+$function$
+;