Update Rust crate rand_distr to 0.6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rand_distr (source)	workspace.dependencies	minor	0.4 → 0.6

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Release Notes

rust-random/rand_distr (rand_distr)

v0.6.0

Compare Source

• Bump to MSRV 1.85.0 and Edition 2024 in line with rand ([#​28])
• Update rand to version 0.10.0 ([#​31], [#​48])

Additions

• MultiDistribution trait to sample more efficiently from multi-dimensional distributions ([#​18])
• Add WeightedAliasIndex::weights() to reconstruct the original weights in O(n) ([#​25])
• ConstMultiDistribution trait as support for fixed-dimension distributions ([#​29])

Changes

• Moved Dirichlet into the new multi module and implement MultiDistribution for it ([#​18])
• Dirichlet no longer uses const generics, which means that its size is not required at compile time. Essentially a revert of [rand#1292]. ([#​30])

Fixes

• Fix Geometric::new for small p > 0 where 1 - p rounds to 1 ([#​36])
• Use direct-minimal-versions ([#​38])
• Fix panic in FisherF::new on almost zero parameters ([#​39])
• Fix panic in NormalInverseGaussian::new with very large alpha; this is a Value-breaking change ([#​40])
• Fix hang and debug assertion in Zipf::new on invalid parameters ([#​41])
• Fix panic in Binomial::sample with n ≥ 2^63; this is a Value-breaking change ([#​43])
• Error instead of producing -inf output for Exp when lambda is -0.0 ([#​44])
• Avoid returning NaN from Gamma::sample; this is a Value-breaking change and also affects ChiSquared and Dirichlet ([#​46])

v0.5.1

Compare Source

Testing

• Added building the crate to CI

Fixes

• Fix missing import for no_std builds

v0.5.0

Compare Source

Dependencies and features

• Bump the MSRV to 1.61.0 ([rand#1207], [rand#1246], [rand#1269], [rand#1341], [rand#1416]); note that 1.60.0 may work for dependents when using --ignore-rust-version
• Update to rand v0.9.0 ([rand#1558])
• Rename feature serde1 to serde ([rand#1477])

API changes

• Make distributions comparable with PartialEq ([rand#1218])
• Dirichlet now uses const generics, which means that its size is required at compile time ([rand#1292])
• The Dirichlet::new_with_size constructor was removed ([rand#1292])
• Add WeightedIndexTree ([rand#1372], [rand#1444])
• Add PertBuilder to allow specification of mean or mode ([rand#1452])
• Rename Zeta's parameter a to s ([rand#1466])
• Mark WeightError, PoissonError, BinomialError as #[non_exhaustive] ([rand#1480])
• Remove support for usage of isize as a WeightedAliasIndex weight ([rand#1487])
• Change parameter type of Zipf::new: n is now floating-point ([rand#1518])

API changes: renames

• Move Slice -> slice::Choose, EmptySlice -> slice::Empty ([rand#1548])
• Rename trait DistString -> SampleString ([rand#1548])
• Rename DistIter -> Iter, DistMap -> Map ([rand#1548])
• Move {Weight, WeightError, WeightedIndex} -> weighted::{Weight, Error, WeightedIndex} ([rand#1548])
• Move weighted_alias::{AliasableWeight, WeightedAliasIndex} -> weighted::{..} ([rand#1548])
• Move weighted_tree::WeightedTreeIndex -> weighted::WeightedTreeIndex ([rand#1548])

Testing

• Add Kolmogorov Smirnov tests for distributions ([rand#1494], [rand#1504], [rand#1525], [rand#1530])

Fixes

• Fix Knuth's method so Poisson doesn't return -1.0 for small lambda ([rand#1284])
• Fix Poisson distribution instantiation so it return an error if lambda is infinite ([rand#1291])
• Fix Dirichlet sample for small alpha values to avoid NaN samples ([rand#1209])
• Fix infinite loop in Binomial distribution ([rand#1325])
• Fix Pert distribution where mode is close to (min + max) / 2 ([rand#1452])
• Fix panic in Binomial ([rand#1484])
• Limit the maximal acceptable lambda for Poisson to solve ([rand#1312]) ([rand#1498])
• Fix bug in Hypergeometric, this is a Value-breaking change ([rand#1510])

Other changes

• Remove unused fields from Gamma, NormalInverseGaussian and Zipf distributions ([rand#1184])
  This breaks serialization compatibility with older versions.
• Add plots for rand_distr distributions to documentation ([rand#1434])
• Move some of the computations in Binomial from sample to new ([rand#1484])
• Reimplement Poisson's rejection method to improve performance and correct sampling inaccuracies for large lambda values, this is a Value-breaking change ([rand#1560])

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[AArnott]

Attempted to rebase this update onto current main.

rand_distr 0.6 resolves, but cargo check -p nerdbank-zcash-rust fails with rand_core trait bound errors in zcash_client_sqlite (R: rand_core::Rng / TryRng overflow). This needs a coordinated rand/rand_core migration across the zcash stack.

Not including this in the bulk dependency PR for now.