chore: update betterleaks to 1.6.1

[SiebeBaree]

Bumps the pinned betterleaks version in src/lib/betterleaks.ts from 1.3.0 to 1.6.1 (the current latest release) and replaces the release asset checksums with the values from betterleaks' official v1.6.1 checksums.txt.

The asset naming scheme is unchanged across the bump, so getAssetName() needed no changes. The CI workflows resolve the latest release at runtime rather than pinning, so they needed no changes either.

Verification

• Ran installBetterleaks() end-to-end on darwin/arm64: download and checksum verification pass, and the installed binary reports 1.6.1.
• Ran runBetterleaks() against this repo: the scan completes and findings parse into the existing Finding shape.
• bun run typecheck, bun run lint, and bun run test:run (179 tests) all pass.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated the Betterleaks release used during installation to version 1.6.1.
  • Updated platform-specific integrity checks to validate the new release assets.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: ec7ca1aa-567c-44cf-8369-2297b7fd03a6

📥 Commits

Reviewing files that changed from the base of the PR and between 666a240 and be0f6a9.

📒 Files selected for processing (1)

• src/lib/betterleaks.ts

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Walkthrough

Updates the pinned Betterleaks release from 1.3.0 to 1.6.1 and replaces SHA-256 checksums for all supported Darwin, Linux, and Windows x64 and arm64 assets used during installation validation.

Estimated code review effort: 1 (Trivial) | ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: upgrading Betterleaks to version 1.6.1.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/update-betterleaks-1.6.1

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