ExcelMaster v0.6.29

This release fixes a false-positive formula validation issue in multi-workbook contexts.

• Same-workbook sheet references are no longer mistaken for sheets from another read-only source workbook.
• Python-based formula edits using LET, FILTER, VSTACK, and similar cross-sheet formulas now correctly allow local sheet references such as Conveyor and Summary.
• Workbook identity handling is more stable when multiple sheets or workbooks are selected.

For users, this improves reliability when ExcelMaster creates or repairs complex formulas that reference other sheets in the same workbook.