test(slack): pass isThreadReply in genuine-thread test scenario

extensions/slack/src/monitor.test.ts

@@ -68,6 +68,7 @@ describe("resolveSlackThreadTs", () => {
             incomingThreadTs: threadTs,
             messageTs,
             hasReplied,
+            isThreadReply: true,
           }),
         ).toBe(threadTs);
       }