(style) ruff pass: import sorting, unused imports, typing-stub cleanup

[rhoadesScholar]

Split out of #70 so the functional changes there stay reviewable. No behavior changes — this is a ruff --fix pass over the Python sources.

Stacked on v2.0_patch: merge #70 first, or retarget this to v2.0 afterwards.

What's here

44 files, all Python/stubs (no Rust, no docs, no test logic):

• Import sorting (I001) — stdlib / third-party / first-party grouping across daisy-py/python/daisy/, tests/, benchmarks/, examples/.
• 3 duplicate-import dedups — benchmarks/bench_dependency_graph.py, benchmarks/bench_worker_scaling.py, tests/test_worker_restarts.py each imported the same module twice.
• 9 unused-import removals (F401) — pytest from tests/daisy_compat/test_clients_close.py, tests/daisy_compat/test_dead_workers.py, tests/test_tcp_client.py; threading from examples/mws.py and tests/test_tcp_client.py; subprocess/sys from tests/test_context_passing.py; tempfile from tests/test_done_marker.py; Block from tests/test_tcp_client.py.
• 2 now-redundant # noqa removals (RUF100) — the suppressed rules no longer fire on those lines.
• Callable moved typing → collections.abc (UP035) in _daisy.pyi.
• Stub cleanups in _daisy.pyi — three redundant __repr__ declarations dropped (PYI029: stubs inherit object.__repr__), and timeout: float | int | object | None → float | object | None (PYI041: int is redundant beside float under the numeric tower).

Verification that it's semantically neutral

An AST-level comparison of every changed file's import set (name + alias, order-insensitive) before vs. after confirms the only net changes are the 9 removals, the 3 dedups, and the Callable module move — everything else is pure reordering. Each removed name was checked to have zero remaining references (the one lingering Block match in tests/test_tcp_client.py is inside a comment).

Full suites pass on this branch and on v2.0_patch identically: pytest tests/ 204 passed / 1 xfailed, cargo test -p daisy-core 46 passed.

Not in scope

The tree is not lint-clean after this — ruff check . still reports 74 findings, dominated by BLE001 (18 blind excepts) and S110 (15 try/except/pass), most of which are deliberate best-effort cleanup paths in the logging and worker-teardown code. There's also no ruff config in pyproject.toml and no lint CI job, so none of this is enforced going forward. Happy to follow up with a pinned [tool.ruff] section plus a CI check if you want the invariant to hold.

🤖 Generated with Claude Code

https://claude.ai/code/session_01KxYd8bCjgZLoESSe3smbwF