fix(auto-reply): normalize block-reply callback to Promise for timeout path (#31200)

* Auto-reply: wrap block reply callback in Promise.resolve for timeout safety

* Build: add strict smoke build script for CI regression gating

* CI: gate strict TS smoke build in check workflow

* docs(changelog): add auto-reply block reply timeout fix under Unreleased

* docs(changelog): credit original #19779 contributor and vincentkoc

src/auto-reply/reply/block-reply-pipeline.ts

@@ -114,10 +114,12 @@ export function createBlockReplyPipeline(params: {
           return false;
         }
         await withTimeout(
-          onBlockReply(payload, {
-            abortSignal: abortController.signal,
-            timeoutMs,
-          }) ?? Promise.resolve(),
+          Promise.resolve(
+            onBlockReply(payload, {
+              abortSignal: abortController.signal,
+              timeoutMs,
+            }),
+          ),
           timeoutMs,
           timeoutError,
         );