chore: Fix compile errors

[kabir]

These were caused by opening #654 before #662 but merging 654 after 662

[gemini-code-assist]

Summary of Changes

Hello @kabir, 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 addresses and resolves compilation errors that were introduced due to a specific sequence of merging related pull requests. The changes ensure that the codebase correctly references an updated enum constant, restoring the build to a working state.

Highlights

• Compilation Error Fix: Resolved compilation errors that arose from an incorrect merge order of previous pull requests. Specifically, the Message.Role.USER enum constant was renamed to Message.Role.ROLE_USER in a prior change, and this PR updates its usage in test files.
• Enum Constant Update: Updated references to the Message.Role enum in AbstractA2AServerTest.java from USER to ROLE_USER to align with the refactored enum definition.

Changelog

• tests/server-common/src/test/java/io/a2a/server/apps/common/AbstractA2AServerTest.java
  • Updated Message.Role.USER to Message.Role.ROLE_USER in delegationMessage builder.
  • Updated Message.Role.USER to Message.Role.ROLE_USER in localMessage builder.

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[gemini-code-assist]

Code Review

This pull request addresses compile errors that occurred due to the merge order of previous pull requests. The changes update the enum value for the message role from Message.Role.USER to Message.Role.ROLE_USER in the test file, which is the correct value according to the Message.Role enum definition. The fix is correct and necessary.