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Starlette renamed HTTP_422_UNPROCESSABLE_ENTITY to HTTP_422_UNPROCESSABLE_CONTENT and now warns on the old spelling; the value is unchanged at 422, so the 20 call sites in the routers move over with no wire-format or frontend impact. Alembic >=1.16 supersedes version_path_separator with path_separator, which governs both prepend_sys_path and version_locations, and warns when it is absent. Together this takes pytest from 26 deprecation warnings to 6. The remainder are slowapi calling asyncio.iscoroutinefunction; they are left visible deliberately, with no filterwarnings entry, as a reminder to revisit once upstream ships a fix. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>