Seedable RNG, benchmark suite, and discrete CDF optimisation - #3

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fix/flaky-rng-tolerances

Commits on Sep 5, 2026

Size RNG test tolerances from estimator standard error

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4f9a5df
Add a seedable shared RNG and make the sampling tests deterministic

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7671393
Add a benchmark suite and performance evidence log

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7482c06
Remove quadratic work from the discrete CDFs and hoist batch invariants

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73ba7d6
Record the optimisation pass in the benchmark log

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8db7afb
Document the build, seeding, benchmarks and tolerance policy

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3c568c5
Fix the regularized incomplete beta, which was wrong at every point

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0e27b85
Widen seed() to 64 bits and mix it through seed_seq

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3f0a23b
Fix the incomplete gamma: unsigned negation and a truncated series

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13fa38d
Fix five defects in the Python distribution classes

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7b9e5ed
Resolve the last two annotation/implementation mismatches in Utils

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8234266
Wire CUDA into the benchmark suite and document the toolchain constraint

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6377d3e
Correct comments that were wrong, stale, or unreadable

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01c4568
Benchmark the three iterative CDFs

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8f0f46f
Make compare.py noise-aware and record the correctness pass

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97d4dae