Release

[sebschmi]

No description provided.

[Copilot]

Pull request overview

This PR prepares a coordinated workspace release by bumping crate versions across the Rust crates, Python bindings, and tests, and includes a small refactor in the A* shortcut strategy implementation.

Changes:

• Bump 0.21.3 -> 0.21.4 across the core Rust crates (generic_a_star, seed_chain, lib_tsalign, lib_tsshow, tsalign) and update dependent version pins.
• Bump lib_ts_chainalign 0.3.3 -> 0.3.4 and update dependents.
• Bump python_bindings/tsalign-tests 0.6.3 -> 0.6.4, and update Cargo.lock accordingly; refactor a match/guard in the shortcut strategy.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tsalign/Cargo.toml	Bumps tsalign and updates internal dependency versions to the new release numbers.
tsalign-tests/Cargo.toml	Bumps test crate version for the release.
seed_chain/Cargo.toml	Bumps seed_chain and updates generic_a_star dependency version.
python_bindings/Cargo.toml	Bumps Python bindings crate and updates lib_tsalign/lib_tsshow dependency versions.
lib_tsshow/Cargo.toml	Bumps lib_tsshow and updates lib_tsalign dependency version.
lib_tsalign/src/.../shortcut.rs	Refactors successor-generation condition into a match guard (no behavior change intended).
lib_tsalign/Cargo.toml	Bumps lib_tsalign and updates internal dependency versions.
lib_ts_chainalign/Cargo.toml	Bumps lib_ts_chainalign and updates internal dependency versions.
generic_a_star/Cargo.toml	Bumps generic_a_star version for the release.
Cargo.lock	Updates locked workspace crate versions to match the release.

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