- Pinned `aiohttp>=3.13,<3.14` in `requirements/base.txt`. aiohttp 3.14.0 removed `aiohttp.streams.AsyncStreamReaderMixin`, which the pinned `vcrpy==8.1.1` aiohttp stub imports at module load — a fresh dependency resolution in CI picked up 3.14.0 and aborted the entire pytest collection with `AttributeError`. The cap should be lifted alongside a `vcrpy` bump that supports the aiohttp 3.14 stream API.
