test: potential fixes for 3 code quality findings in tests/zip_crypto.rs

[Pr0methean]

This PR applies 3/5 suggestions from code quality AI findings. 2 suggestions were skipped to avoid creating conflicts.

[gemini-code-assist]

Summary of Changes

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This pull request improves code readability and maintainability by applying specific code quality suggestions. The changes involve renaming local variables in cryptographic test cases to use more descriptive identifiers, making it clearer what data each variable holds after file decryption.

Highlights

• Code Quality Improvement: Implemented three code quality suggestions from AI findings, focusing on variable renaming for enhanced clarity in test files.
• Variable Renaming: Renamed ambiguous variables like buf and data to more descriptive names such as file_contents and decrypted_data within zip_crypto.rs tests.

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[amazon-q-developer]

This PR improves code quality by addressing variable naming issues in test code. The changes rename variables to be more descriptive (buf → file_contents, data → decrypted_data/file_contents) and resolve a variable shadowing situation. All changes are in test code and maintain the same functionality while improving readability. The code functions correctly both before and after these changes.

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[gemini-code-assist]

Code Review

This pull request successfully addresses three code quality findings by renaming variables in the zip_crypto.rs test file. The changes improve the clarity and readability of the test code by using more descriptive variable names such as file_contents and decrypted_data instead of generic names like buf or data. These are positive changes that enhance code maintainability.