perf: early out if no solve is needed #404

Job	Run time
Cargo Machete	38s
pre-commit	47s
determine changes	8s
build binary \| windows aarch64	1s
build binary \| macos aarch64	23s
build binary \| macos x86_64	0s
build binary \| linux x86_64	2s
cargo test \| ubuntu	1s
build binary \| windows x86_64	1s
cargo test \| macos aarch64	1s
cargo test \| windows	1s
cargo test \| macos x86_64	0s
cargo rustdoc \| ubuntu	33s
cargo fmt \| ubuntu	14s
cargo clippy \| ubuntu	36s
pytest integration \| windows x86_64	1s
test wheel installation \| windows x86_64	1s
pytest integration \| linux x86_64	1s
test wheel installation \| linux x86_64	1s
pytest integration \| macos aarch64	1s
test wheel installation \| macos aarch64	1s
	3m 32s

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