feat: simplify SOP to immediate-effect configuration

migrations/000004_remove_review_workflow.up.sql

@@ -0,0 +1,15 @@
+UPDATE sop_versions
+SET status = 'draft', reviewed_by = NULL
+WHERE status = 'reviewing';
+
+UPDATE sops
+SET status = CASE
+  WHEN EXISTS (
+    SELECT 1
+    FROM sop_versions
+    WHERE sop_versions.sop_id = sops.id
+      AND sop_versions.status = 'published'
+  ) THEN 'published'
+  ELSE 'draft'
+END
+WHERE status = 'reviewing';