Implement RRule merging logic for ScheduleSet with iterative reduction#240

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Copilot wants to merge 7 commits intorrulefrom

copilot/sub-pr-239

Commits on Dec 8, 2025

Initial plan
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Update plan to handle more general simplification logic

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jkrrv
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Implement mergeIfPossible() logic for ScheduleSet - all tests passing

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jkrrv
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Address code review feedback - add constants and improve encapsulation

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Implement iterative reduction and fix end date compatibility logic

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Fix infinite loop bug in iterative merge logic

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jkrrv
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Add comprehensive unit tests for Schedule and ScheduleSet classes

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jkrrv
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