chore(release): release v0.4.0

[acgetchell]

• Bump version to v0.4.0
• Update changelog with latest changes
• Update benchmark comparison table
• Update documentation for release

Summary by CodeRabbit

Release Notes

• Release

  • Version 0.4.0 is now available

• Maintenance

  • Enhanced benchmark baseline management restricted to main branch
  • Added performance regression detection for exact-arithmetic benchmarks

• Documentation

  • Updated dependency examples to version 0.4.0
  • Refreshed benchmark comparison metrics
  • Updated benchmarking guides with latest baseline references

[coderabbitai]

📝 Walkthrough

Walkthrough

Version bump and release preparation for v0.4.0 across package metadata, changelog, and documentation. Updates version numbers in Cargo.toml, CITATION.cff, and documentation examples, adds release notes to CHANGELOG.md, and refreshes benchmark baseline references and table values.

Changes

Cohort / File(s)	Summary
Version & Metadata Cargo.toml, CITATION.cff	Incremented version from 0.3.0 to 0.4.0 in package manifest and citation metadata.
Release Documentation CHANGELOG.md	Released v0.4.0 entry (2026-04-11) with new items under Changed and Maintenance categories; updated reference links to reflect released version.
User-Facing Documentation README.md, docs/BENCHMARKING.md	Updated dependency examples and benchmark baseline tag references from v0.3.0 to v0.4.0; refreshed LU solve benchmark table values and computed percentage comparisons.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• chore(release): release v0.2.0 #37: Related release bump with matching version field updates and release documentation changes.
• chore(release): release v0.1.3 #20: Related release-related changes including Cargo.toml version bump and README benchmark table updates.
• chore(release): release v0.2.1 #39: Related release-related edits with version bumps and changelog/README updates.

Suggested labels

documentation

Poem

🐰 A hop, a skip, and version four,
The benchmarks dance as before,
With v0.4.0 now released with care,
The changelog sings into the air,
Baselines bloom in springtime light! 🌱

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main purpose of the changeset: a version release from 0.3.0 to 0.4.0 with corresponding updates to all version references and documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/v0.4.0

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@CHANGELOG.md`:
- Line 8: The CHANGELOG.md was edited manually; revert any manual edits to
CHANGELOG.md and regenerate the file using the project tooling instead: run the
tooling commands mentioned (just changelog and just changelog-unreleased 0.4.0)
to produce the correct changelog content, commit the generated output, and
ensure no direct edits remain in CHANGELOG.md (this also applies to the other
occurrences flagged at lines 21, 37, and 231).

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d27a5b14-0afb-4cff-8c80-e085219abb84

📥 Commits

Reviewing files that changed from the base of the PR and between 3951280 and 843bb3c.

⛔ Files ignored due to path filters (3)

• Cargo.lock is excluded by !**/*.lock
• docs/assets/bench/vs_linalg_lu_solve_median.csv is excluded by !**/*.csv
• docs/assets/bench/vs_linalg_lu_solve_median.svg is excluded by !**/*.svg

📒 Files selected for processing (5)

• CHANGELOG.md
• CITATION.cff
• Cargo.toml
• README.md
• docs/BENCHMARKING.md

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.26%. Comparing base (3951280) to head (843bb3c).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #75   +/-   ##
=======================================
  Coverage   90.26%   90.26%           
=======================================
  Files           5        5           
  Lines         452      452           
=======================================
  Hits          408      408           
  Misses         44       44           

Flag	Coverage Δ
unittests	90.26% <ø> (ø)

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