Merge pull request #212 from jmooves/upstream-pr/chat-messages-workflow-column

fix(db): add missing chat_messages.workflow column (user prompts dropped on reload)

backend/schema.sql

@@ -550,6 +550,7 @@ create table if not exists public.chat_messages (
   role text not null,
   content jsonb,
   files jsonb,
+  workflow jsonb,
   citations jsonb,
   created_at timestamptz not null default now()
 );