chore(deps): prune [dependency-groups] to what the environment actually needs

[tschm]

Why

Since rhiza #1380 every gate provisions its own tooling on the fly — uv run --with pytest --with pytest-cov ... in test, --with ty / --with mypy in typecheck, --with interrogate in docs-coverage, uvx pre-commit (which runs the ruff hooks) in fmt. A tool named by a --with flag earns nothing by also being declared in [dependency-groups].

Dropped

Two whole groups:

• typecheck (ty, mypy) existed so uv run ty check resolved from the project environment — and with it the [tool.uv] default-groups = ["dev", "typecheck"] entry that made it default. The typecheck target injects both tools itself, so default-groups returns to ["dev"].
• lint held ruff, which reaches the tree through the pre-commit hooks.

uv.lock loses 265 lines.

The lint key stays, empty: the synced .rhiza/tests/test_pyproject.py asserts a lint group is declared. That assertion is gone in rhiza after #1484, so the key can go on the next template sync.

Nothing leaves dev

Every entry there is imported rather than injected. Two are less obvious than the rest, so both now carry a comment:

• pandas is imported inside test_ewm_cov.py::test_matches_pandas_ewm_cov, not at module scope, so it does not appear in a top-level import scan.
• pytest-timeout is not injected by benchmark, hypothesis-test or stress, and pytest.ini sets both timeout = 60 and filterwarnings = error — so its absence is not a warning here but a hard Unknown config option failure.

Verification

Run locally against an --exact sync, so the pruned packages were genuinely absent rather than left behind by uv sync --inexact:

• make all — prek hooks, deptry clean, pip-licenses, ty + mypy clean (Success: no issues found in 33 source files), 305 tests at 100% coverage, 39 rhiza-tests
• make hypothesis-test — 26 property tests

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR streamlines the project’s uv dependency-group setup so only packages that must exist in the project environment remain declared, relying on rhiza gates to provision their tooling via uv run --with ... / uvx instead.

Changes:

• Removes the typecheck dependency group and resets [tool.uv].default-groups back to ["dev"].
• Empties (but keeps) the lint dependency group to satisfy the currently-synced rhiza pyproject structure test.
• Regenerates uv.lock accordingly, dropping now-unreferenced packages and updating dependency-group metadata.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 1 comment.

File	Description
pyproject.toml	Prunes [dependency-groups] (drop typecheck, keep empty lint) and updates uv default groups to reflect rhiza gate tool injection.
uv.lock	Updates locked dependency-group metadata and removes packages no longer required by declared groups.

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