add freeze feature to rundown (#1106)

* add frozen flag to runtime store

* add middleware for when frozen

* prevent rundown editing when frozen

* add endpoint to router to set frozen state

* add frozen property to rundown placeholder in client

apps/server/src/api-data/rundown/rundown.validation.ts

@@ -21,6 +21,15 @@ export const rundownPutValidator = [
   },
 ];
 
+export const rundownFrozenPostValidator = [
+  body('frozen').isBoolean().exists(),
+  (req: Request, res: Response, next: NextFunction) => {
+    const errors = validationResult(req);
+    if (!errors.isEmpty()) return res.status(422).json({ errors: errors.array() });
+    next();
+  },
+]
+
 export const rundownBatchPutValidator = [
   body('data').isObject().exists(),
   body('ids').isArray().exists(),