Fix pr-rework crash — guard against missing review.state

Gitea sends review objects without a state field in some cases.
Use optional chaining and log the review payload for debugging.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/handlers/pr-rework.ts

@@ -16,7 +16,8 @@ export function prRework(config: Config, queue: TaskQueue) {
       return c.text("ignored: not a reviewed event", 200);
     }
 
-    if (!event.review) {
+    if (!event.review?.state) {
+      console.log(`[pr-rework] ignored: no review state (review: ${JSON.stringify(event.review)})`);
       return c.text("ignored: no review data", 200);
     }