changes to set default checksum option as CRC32C

[devarr1994]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @devarr1994, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the default checksum validation mechanism for file uploads. Previously, a generic 'true' value was used, but now it explicitly defaults to 'crc32'. This change ensures a specific and consistent checksum algorithm is applied by default, improving data integrity checks. Corresponding unit tests have been added to confirm this new default behavior.

Highlights

• Default Checksum: The default value for the 'validate' option in 'resolveUploadOptions' has been changed from 'true' to 'crc32'.
• Test Coverage: New test cases have been added to 'validationMethod' to verify that 'null' and empty string values for the 'validate' option correctly resolve to 'crc32'.

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[gemini-code-assist]

Code Review

This pull request aims to change the default checksum validation to CRC32C. The current implementation uses 'crc32' as the new default, which appears to be an alias for 'crc32c'. For better clarity and to align with the PR's intent, I've suggested using 'crc32c' directly. Additionally, the new unit tests have an incorrect expected value; they expect 'crc32' but the code logic will produce 'crc32c'. I've provided suggestions to correct the tests to reflect the actual behavior and ensure they pass.