fix: remove flaky setTimeout in todo bus event test

`Bus.publish` is synchronous — the event is delivered immediately,
no 50ms delay needed. Removes resource contention risk in parallel CI.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: anandgupta42

packages/opencode/test/session/todo.test.ts

@@ -118,8 +118,7 @@ describe("Todo: CRUD lifecycle", () => {
         const todos = [{ content: "Emit test", status: "pending", priority: "high" }]
         Todo.update({ sessionID: session.id, todos })
 
-        await new Promise((resolve) => setTimeout(resolve, 50))
-
+        // Bus.publish is synchronous — event is delivered immediately
         unsub()
 
         expect(eventReceived).toBe(true)