Test UUID

[holtskinner]

Description

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Fixes #<issue_number_goes_here> 🦕

[gemini-code-assist]

Summary of Changes

Hello @holtskinner, 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 refactors the project's core data models to leverage UUID objects for various identifiers instead of generic strings. This change improves type safety and data integrity by ensuring that IDs conform to the UUID standard. The update propagates through the codebase, affecting type generation, Protobuf serialization, and ID generation logic. Comprehensive test updates ensure compatibility and correctness with the new UUID-based approach.

Highlights

• Type System Enhancement: The core data models in src/a2a/types.py have been updated to use UUID objects instead of plain strings for various identifier fields, such as task IDs, message IDs, and artifact IDs. This enhances type safety and ensures proper UUID handling.
• Build Process and Schema Update: The scripts/generate_types.sh script now fetches the A2A specification from a dedicated uuid-fields branch, indicating a schema evolution. Additionally, it incorporates ruff check --fix-only to automatically apply linting fixes during type generation.
• Utility Function Adaptations: The utility functions in src/a2a/utils/proto_utils.py and src/a2a/utils/task.py have been adjusted to correctly handle the new UUID types. This includes explicit conversion to strings for Protobuf serialization and streamlined UUID generation logic.
• Comprehensive Test Data Refinement: A significant number of test files across the client, server, and utility modules have been updated. This involves replacing generic string IDs with actual UUID string formats in test data and assertions, ensuring that tests align with the new UUID type enforcement.

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[gemini-code-assist]

Code Review

This pull request updates various identifiers from str to UUID across the codebase, which is a great improvement for type safety. The related changes in utility functions and tests are mostly correct. However, I've found several instances in the test files where UUID objects are being compared directly to string literals, which will cause test failures. These assertions need to be updated to convert the UUID object to a string before comparison. Additionally, a script has been updated to point to a feature branch, which should be reverted to main before merging.