Add debug information for queue handler timeouts caused by lingering waituntils

[jbwcloudflare]

@a-robinson and I are trying to add some debug information to help identify the cause of an issue where queue events seem to hang for 15 minutes (the timeout duration).

This info should tell us:

• Is the user's queue() handler function actually finishing?
• Are there other waitUntil tasks that are causing the event to run for 15 minutes then timeout?

[a-robinson]

Let me know if you could use help testing this out locally!

[a-robinson]

Just a couple nits, but LGTM otherwise.

[jbwcloudflare]

Tested this out with some local ew-test-bins, logs are looking good:

1m10	4c6539480 warning workerd/api/queue.c++:556 NOSENTRY queue event timed out; status = Incomplete; tasks = task: src/edgeworker/server/edgeworker@64c3f20|task: src/edgeworker/server/edgeworker@64c3f20|task: src/edgeworker/server/edgeworker@64c3f20 src/edgeworker/server/edgeworker@83e6f10; ownerId = 1212; zoneId = zone; scriptId = exceeded-cpu-queue-handler; cordon = paid; process = rpc

1m10	4c6539480 warning workerd/api/queue.c++:556 NOSENTRY queue event timed out; status = Completed Succesfully; tasks = task: src/edgeworker/server/edgeworker@64c3f20|task: src/edgeworker/server/edgeworker@64c3f20; ownerId = 1212; zoneId = zone; scriptId = exceeded-cpu-queue-handler; cordon = paid; process = rpc

1m10	4c6539480 warning workerd/api/queue.c++:556 NOSENTRY queue event timed out; status = Completed with error:workerd/jsg/_virtual_includes/jsg/workerd/jsg/value.h:1334: failed: jsg.Error: sorry|stack: src/edgeworker/server/edgeworker@83e6f10; tasks = task: src/edgeworker/server/edgeworker@64c3f20|task: src/edgeworker/server/edgeworker@64c3f20; ownerId = 1212; zoneId = zone; scriptId = exceeded-cpu-queue-handler; cordon = paid; process = rpc

[jbwcloudflare]

@dom96 / @jasnell this is ready for review when you have time 🙏

[jbwcloudflare]

bump, sorry to bug you guys @jasnell / @dom96, could you take a look please? 🙏