coroutine 'HN.item' was never awaited warning if quitting while loading

[davep]

[I think this only shows if using Python 3.12, but it's an untidy thing regardless]

If you fire up oshit and then escape out while the initial list of items is still loading, you'll see something like this:

/opt/homebrew/Cellar/[email protected]/3.12.2_1/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/base_events.py:1970: RuntimeWarning: coroutine 'HN.item' was never awaited
  handle = self._ready.popleft()
RuntimeWarning: Enable tracemalloc to get the object allocation traceback

At first glance I imagine the issue is that Items._load is getting cancelled (it's an async worker), which in turn means that the requests that are still sat in the queue are getting abandoned, thus being left unawaited. Pragmatically this isn't a problem, we're fine with this. Technically though those corountines sat in semaphore-protected gather should be cancelled somehow, as the app quits.