fix(plugin): verify event hook compatibility with v1.4.0

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/todo-continuation-enforcer/pending-question-detection.ts

@@ -2,7 +2,7 @@ import { log } from "../../shared/logger"
 import { HOOK_NAME } from "./constants"
 
 interface MessagePart {
-  type: string
+  type?: string
   name?: string
   toolName?: string
 }