fix(launch): allow 1x2 groups in perspecta URI parser

[timcogan]

Summary by CodeRabbit

• Enhancements
  • Group size configuration now supports 2-item groups in addition to 1 and 4-item groups.
  • Updated validation messages for clarity on supported group sizes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 12460e4 and b15aa99.

📒 Files selected for processing (1)

• src/launch.rs

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📝 Walkthrough

Walkthrough

The pull request expands valid group sizes for both LocalGroups and DicomWebGroups from {1, 4} to {1, 2, 4}. Error messages are updated to reflect the new valid counts, and tests are added to validate two-item group parsing and construction.

Changes

Cohort / File(s)	Summary
Group Size Validation src/launch.rs	Expanded allowed group sizes from {1, 4} to {1, 2, 4} for LocalGroups and DicomWebGroups; updated validation error messages and added test coverage for two-item group scenarios.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Add support for 1x2 layout #18: Adds two-item (1x2) support by expanding allowed group sizes from {1, 4} to {1, 2, 4} with corresponding validation and test updates.

Poem

🐰 Two became valid in the group, hooray!
From one and four, now sizes play,
Validation rules expanded wide,
Tests confirm the changes inside,
Double delight in every way! 🎯✨

🚥 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 and specifically describes the main change: allowing 1x2 groups in the perspecta URI parser, which aligns directly with the core modification in src/launch.rs.
Docstring Coverage	✅ Passed	Docstring coverage is 85.71% which is sufficient. The required threshold is 80.00%.

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✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/uri-parser-1x2-groups

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