Add Asyncio support #9

Why

Asyncio applications need a native Transloadit client while the synchronous handwritten surface remains available.

Delivered in Python SDK 2.0.0 by #57 and #56, both squash-merged. Python 3.12+ is required. Contract-generated endpoints are deferred to #61, blocked by api2#9252 and linked to #60.

Published GitHub release and PyPI package; stable documentation is built from the release tag. All seven release-commit CI jobs pass, including Windows and live E2E. Council review finished with no retained findings; tim-kos was requested.

_{🤖 Claimed by kvz on framework1/python-sdk since 2026-10-11 · resume: codex resume 01a12c04-6ff8-7a91-9987-654db44d852e}