add integer support to balance algorithm; apply formatting #2350

Job	Run time
Rust format check / rust-format-check	12s
Run benchmarks / Rust Benchmark (ubuntu-latest)	26m 26s
Run Python tests / select-strategy	1s
Run Rust tests / Rust Tests (macos-latest)	4m 7s
Run Rust storage tests / Rust Tests (macos-latest)	15m 6s
Run Rust tests / Rust Tests (ubuntu-20.04)	5m 45s
Run Rust storage tests / Rust Tests (ubuntu-20.04, -C link-arg=-fuse-ld=lld)	19m 4s
Run Rust tests / Rust Tests (windows-latest)	8m 54s
Run Rust storage tests / Rust Tests (windows-latest)	30m 41s
Run Rust tests / Doc tests (ubuntu-latest)	5m 5s
Run Python tests / Python Tests (3.9, macos-latest)	16m 16s
Run Python tests / Python Tests (3.9, ubuntu-latest)	10m 58s
Run Python tests / Python Tests (3.9, windows-latest)	36m 10s
Run Python tests / Python Tests (3.13, macos-latest)	15m 34s
Run Python tests / Python Tests (3.13, ubuntu-latest)	13m 45s
Run Python tests / Python Tests (3.13, windows-latest)	36m 31s
	4h 4m 35s

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