优化日程提醒逻辑：改善内存管理、防重复提醒和可配置提醒间隔#8

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copilot/optimize-reminder-task-logic

Commits on Sep 9, 2025

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Optimize ReminderTask logic with memory management, deduplication, and configurable intervals

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LazuliKao
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Fix event key format and cleanup logic for better reliability

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LazuliKao
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Commits on Sep 11, 2025

Optimize event deduplication mechanism and ensure _scheduledEvents cleanup

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LazuliKao
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