Fix case with CFFType1FontProgram in OpenTypeFontProgram

[MaximPlusov]

Summary by CodeRabbit

• Bug Fixes
  • Improved font format handling to better support complex nested font structures, enabling proper recognition of fonts that were previously not processed correctly.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: f3b74a6a-3498-46b1-b32f-814bfacea8b5

📥 Commits

Reviewing files that changed from the base of the PR and between 5164caf and dca1c9f.

📒 Files selected for processing (1)

• src/main/java/org/verapdf/pd/font/cff/CFFType1FontProgram.java

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📝 Walkthrough

Walkthrough

The PR enhances CFFType1FontProgram.getCFFType1() to support multi-level font program unwrapping. It adds support for extracting CFFType1FontProgram from OpenTypeFontProgram wrapping and maintains existing CFFFontProgram unwrapping.

Changes

Font Program Unwrapping Enhancement

Layer / File(s)	Summary
Font unwrapping logic src/main/java/org/verapdf/pd/font/cff/CFFType1FontProgram.java	Imports OpenTypeFontProgram and reworks getCFFType1() to sequentially unwrap OpenTypeFontProgram and CFFFontProgram to extract the underlying CFFType1FontProgram.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 A font unwraps its layers fine,
From OpenType to CFF inline,
The rabbit hops through wrapper chains,
To find the Type1 that remains! ✨

🚥 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 directly and specifically describes the main fix: handling CFFType1FontProgram when wrapped in OpenTypeFontProgram, which matches the primary change in the diff.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
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.

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✨ Finishing Touches

📝 Generate docstrings

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🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch open_type

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