rust-bitcoin

This commit is a routine release-preparation change. It bumps the version number of the `bitcoin_hashes` crate from 0.21.0 to 1.0.0, updates the changelog, and updates dependency references in lock files and other crates' configuration files. There are no code changes and no security relevance.

This is a small performance improvement for fuzz testing code. It changes how random Bitcoin P2P command strings are generated during fuzzing, avoiding a temporary String allocation. There is no security issue visible in the change.

This commit is a routine automated code-formatting run by the rustfmt tool. It only changes whitespace, line breaks, and import grouping in six files. No program logic, security checks, or behavior were altered.

This commit is a pure code cleanup: it renames an internal helper macro from `engine_input_impl!` to `impl_engine_input!` and switches its syntax from parentheses to curly braces. No logic, behavior, or security properties of the hashing code change.

This commit adds compiler hints to three small functions in the rust-bitcoin hashes crate, suggesting the compiler should inline them. It does not change behavior, fix a bug, or address any security issue.

This commit adds a standard Rust trait implementation that lets two error types be automatically converted from the 'Infallible' type (a type that can never actually exist). It is a routine ergonomic improvement and does not fix any security bug or change runtime behavior.

This commit only changes the wording of code comments (documentation) from singular verbs like 'Finalize' to plural verbs like 'Finalizes' to match the project's style convention. No actual program code was modified, so it cannot affect security or behavior.

This commit only updates documentation comments in a single Rust source file. It rewords explanations, adds a forward-compatibility note, and removes an embedded shell example from the docs. No code logic, function signatures, or behavior changed.

This commit adds two small Rust trait implementations that allow certain error types to be automatically converted from the 'Infallible' type. 'Infallible' is a type that can never actually exist, so these conversions are purely for making the error types easier to use in generic code. There is no security issue here.

This is a routine code cleanup that renames the type `DerivationPath` to `RelativeDerivationPath` throughout the project. The change is purely a refactor: it does not alter how the code behaves, what it computes, or how it handles data. The commit message explicitly says the rename is intended to force other developers to update their code so the maintainers can identify places that may later need a new `AbsoluteDerivationPath` type. There is no security fix or vulnerability here.

This commit refactors how Bitcoin BIP-32 derivation paths are represented in the rust-bitcoin library. It splits the old single DerivationPath type into two: DerivationPath (relative paths like 0'/1) and AbsoluteDerivationPath (master-prefixed paths like m/0'/1). The goal is to make wallet code more explicit about whether it is deriving from the master key or from an intermediate key. The change is a type-system/API hardening, not a fix for a known exploitable bug. It may prevent future misuse where a relative path is accidentally treated as absolute or vice versa, but the commit itself does not describe any active vulnerability.