Fix enhance integration test: wrong param name and import

[daveronan]

Summary

• Fix retrieve_enhanced_track call in integration test: max_attempts -> timeout to match the current method signature
• Fix import: MusicalStyle -> EnhanceMusicalStyle (correct enum for the enhance endpoint)

Test plan

• 143 unit tests passing
• Run enhance integration test manually to verify (@pytest.mark.skip by default)

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Note

Low Risk
Low risk: changes are confined to a skipped integration test and only adjust argument names/imports to match current client APIs.

Overview
Fixes the enhance integration test to match current SDK interfaces by switching the style enum from MusicalStyle to EnhanceMusicalStyle and updating the polling call to use timeout instead of the old max_attempts parameter.

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