[Tcode-Motion]

🎯 What: Missing unit tests for register_uuid in stdlib/src/uuid.rs.
📊 Coverage: Added test coverage for register_uuid module registration, metadata verification (std.uuid name, version, empty required capabilities), function metadata (uuid_v4 name, arity), and runtime call output format.
✨ Result: Ensures the std.uuid standard library module and uuid_v4 function are correctly registered and executable.

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PR created automatically by Jules for task 12443622489573795815 started by @Tcode-Motion

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