Protect timing execution semantics in RhythmActions with regression tests

[mahesh-09-12]

Description

This PR adds regression tests protecting execution semantics in RhythmActions, including:

• beatFactor lifecycle restoration after dot/multiply
• duration resolution priority in getNoteValue
• osctime vs note behavior differences
• nested note voice activation

No production code changes.
All existing tests pass.
Focus is on protecting timing invariants from future refactors.

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[mahesh-09-12]

Hi @walterbender @omsuneri, added regression guards around timing invariants in RhythmActions to prevent silent execution drift during refactors.
Would appreciate feedback when you get time.

[github-actions]

❌ Some Jest tests failed. Please check the logs and fix the issues before merging.

Failed Tests:

palette.test.js
logo.test.js
logoconstants.test.js

[omsuneri]

@mahesh-09-12 please rebase your branch with upstream master

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[mahesh-09-12]

@omsuneri rebased with upstream master, all checks are passing.

[mahesh-09-12]

Hi @omsuneri , just a gentle follow-up. The branch has been rebased with upstream master and all checks are passing. Please let me know if any further changes are needed. Thanks!