obstore: add build-obstore.yml for riscv64 wheels - #865

• Package: obstore
• Version: 0.11.1
• Source: https://github.com/developmentseed/obstore
• Docs: https://developmentseed.org/obstore

PyO3/maturin bindings over Rust's object_store crate — a fast Python interface to S3, GCS, Azure and HTTP object stores. Upstream publishes no riscv64 wheel.

Mirrors the linux job of upstream's wheels.yml, which builds the module twice: once abi3, once per interpreter.

Differs from upstream

• musllinux dropped — rustup ships no riscv64 musl toolchain.
• cp310 and pypy3.11 wheels dropped — below this repo's cp312 floor / no PyPy builds here.
• LICENSE staged beside the module's pyproject — upstream's wheels ship no licence text.

Matrix: cp311-abi3 plus cp314-cp314t, matching upstream's two builds. Built on cp311, the oldest interpreter its tag claims, and re-tested on cp312-cp314. cp313t is dropped: the riscv64 manylinux image ships none.

Testing

• deselects the minio-backed S3Store tests and tests/test_fsspec.py/tests/auth/ (need a live server or pystac).
• runs everything else: Memory/LocalStore round trips, attributes, backoff, buffered I/O, bytes, copy/delete/head/list/put/rename, and the non-network store config/URL-parsing tests.

License: MIT; upstream ships no licence text in the wheel, so the build adds it.

Built on cp311 and cp314t; results pending CI.