…in (#1)

## Summary

Adds a minimal **`setup.py` / `setup.cfg`** shim so **`python setup.py
sdist`** and **`python setup.py bdist_wheel`** delegate to
**`maturin`**, for build environments that still drive distributions
through setuptools instead of **`python -m build`**. Canonical build
metadata remains in **`pyproject.toml`** / **`[tool.maturin]`**.

## Details

- **`setup.py`**: Custom `sdist` / `bdist_wheel` commands invoke
`maturin`; if `maturin` is missing, the shim runs **`pip install
maturin`** for the active interpreter (first-time installs may need
network access).
- **Version**: **`1.26.0.post0`** in **`pyproject.toml`** and
**`setup.cfg`**; **`temporalio.__version__`** remains **`1.26.0`**
unless aligned in a follow-up.
- **Metadata**: Project URLs updated to this fork’s GitHub location;
documentation URL still points at the upstream project docs. Removed the
**`License :: OSI Approved :: MIT License`** Trove classifier so
**setuptools ≥69** can merge **`pyproject.toml`** without a PEP 639
conflict (license remains **`MIT`** in `[project]`).
- **`.gitignore`**: **`*.egg-info/`** for local `setup.py` / `egg_info`
runs.

## How to verify

```bash
git submodule update --init --recursive
export PATH="$HOME/.cargo/bin:$PATH"   # or your Rust install
python setup.py sdist
python setup.py bdist_wheel

## Summary
- Replace the PEP 639 shorthand metadata in `pyproject.toml` with the
older PEP 621 table form.

…der (#3)

## Summary

- Adds `override_origin: str | None = None` to `Client.connect()` (and
`CloudOperationsClient.connect()`), wired through `ConnectConfig` →
Python bridge → Rust Core `ConnectionOptions::override_origin`
- Sets the HTTP/2 `:authority` pseudo-header on every gRPC call,
enabling Python workers to connect through an Envoy sidecar that routes
by `:authority`
- Achieves feature parity with the Go SDK (`client.Options.HostPort`)
and Rust Core (`ConnectionOptions::override_origin`)

This is a cherry-pick of the same change from `sergiof/override-origin`
(targeting upstream `temporalio/sdk-python:main`). After internal
validation here, we will open the upstream PR.

## Test plan

- [x] Unit tests:
`test_connect_config_override_origin_forwarded_to_bridge`,
`test_connect_config_override_origin_defaults_to_none`
- [x] Integration test: `test_override_origin_end_to_end` — spins up a
`grpc.aio` fake WorkflowService, connects with `override_origin` set,
confirms `GetSystemInfo` is called and standard gRPC metadata is intact
- [x] Error test: `test_override_origin_invalid_uri_raises` — confirms a
bad URI string raises `ValueError` before any network call
- [x] `test_client_connect_config_matches_connect_params` guard passes
(TypedDict in sync)
- [ ] Manual validation: deploy a Python worker with
`override_origin="http://temporal-frontend"` and confirm it connects
through Envoy to the CloudSec Temporal instance

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

## Summary
- Bumps package version from `1.26.0.post0` to `1.26.0.post1` in
`pyproject.toml` and `setup.cfg`

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>