chore: release v0.11.0

[jayhesselberth]

Version bump and changelog for v0.11.0. MINOR: leech model train --gpus N
is new and nothing existing breaks.

Versions moved in all five places tests/test_rust_version_pairing.py and the
check-version job require: pyproject.toml [project] version, the
leech-core== pin in its rust extra, rust/Cargo.toml, the leech_core
block in rust/Cargo.lock, and the leech entry in uv.lock.

Targeted rewrites rather than find-and-replace: rust/Cargo.lock also carries
chacha20, rand and rand_core at 0.10.0, and uv lock would re-serialize
~670 unrelated lines.

Verified at 0.11.0 after refreshing the editable install (which caches its
version and otherwise reports the old one — the stale-half condition
check_rust() exists to catch):

• check_rust() — leech_core 0.11.0, no mismatch warning
• ruff format --check + ruff check — clean, 159 files
• ty check src/leech/ — clean
• pytest — 1569 passed, 44 skipped
• uv build — leech-0.11.0-py3-none-any.whl, leech-0.11.0.tar.gz

Merging this and pushing the v0.11.0 tag publishes both distributions to PyPI.

🤖 Generated with Claude Code

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