fix(adr-117/p1): standalone Cargo.toml + python-source=. + #[pyo3(name=_native)] (P1 GREEN)
Three fixes to make maturin develop actually work locally:
1. `python/Cargo.toml` removed `*.workspace = true` inheritance —
the python/ crate is intentionally outside the v2/ workspace
(ADR-117 §5.2) so it needs every `[package]` field local.
2. `python/pyproject.toml` `python-source = "python"` was wrong
because pyproject.toml lives at python/ — maturin was looking for
python/python/. Changed to `python-source = "."` so the
`wifi_densepose/` package directory sibling-to-pyproject is found.
3. `python/src/lib.rs` `#[pymodule] fn wifi_densepose_native` →
`#[pymodule] #[pyo3(name = "_native")] fn wifi_densepose_native`.
PyO3 generates `PyInit__native` from the pyo3-name attribute, which
must match the `module-name` in pyproject.toml's [tool.maturin]
block ("wifi_densepose._native"). Without this attribute the wheel
builds but `import wifi_densepose._native` fails with
ModuleNotFoundError.
## Local validation (P1 acceptance gate)
```
$ python -m venv .venv && .venv/Scripts/python -m pip install maturin pytest
$ VIRTUAL_ENV=… maturin develop --release
…
Finished `release` profile [optimized] target(s)
📦 Built wheel for abi3 Python ≥ 3.10
🛠 Installed wifi-densepose-2.0.0a1
$ .venv/Scripts/python -c 'import wifi_densepose; print(wifi_densepose.__version__, wifi_densepose.__rust_version__, wifi_densepose.hello())'
2.0.0a1 2.0.0-alpha.1 ok
$ .venv/Scripts/python -m pytest tests/ -v
tests/test_smoke.py::test_package_imports PASSED
tests/test_smoke.py::test_version_string_well_formed PASSED
tests/test_smoke.py::test_rust_version_surfaced PASSED
tests/test_smoke.py::test_build_features_listed PASSED
tests/test_smoke.py::test_hello_returns_ok PASSED
tests/test_smoke.py::test_native_module_private PASSED
======================== 6 passed in 0.05s =========================
```
P1 closed. Moving to P2 (core type bindings).
Refs #785, ADR-117 §6.
Co-Authored-By: claude-flow <ruv@ruv.net>
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