Add Excel Driver with ExcelJS (secure, no CVEs) - with flexible storage modes#108

Merged

huangyiirene merged 9 commits intomainfrom

copilot/add-excel-driver-functionality

Jan 16, 2026

Commits on Jan 16, 2026

Initial plan
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Add Excel Driver implementation with full test coverage

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Add Excel Driver demo example with working implementation

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Address code review feedback: improve data type handling, ID parsing, and documentation

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Final refinements: prevent mutation side effects and clarify test intent

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SECURITY FIX: Replace xlsx with ExcelJS to eliminate CVEs (ReDoS, Prototype Pollution)

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Improve error handling and documentation for data format requirements and corrupted files

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Add file storage mode option and comprehensive English README

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Remove demo data files and old README from git tracking

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