Allow updating production plan responsibility

backend/db.js

@@ -796,7 +796,8 @@ const initDB = async () => {
         // role-based assignments be added without changing historical plans.
         await pool.query(`
             ALTER TABLE production_plans
-            ADD COLUMN IF NOT EXISTS responsible_user_id INTEGER REFERENCES app_users(id) ON DELETE SET NULL;
+            ADD COLUMN IF NOT EXISTS responsible_user_id INTEGER REFERENCES app_users(id) ON DELETE SET NULL,
+            ADD COLUMN IF NOT EXISTS responsible_name TEXT;
         `).catch(() => {});
 
         await pool.query(`