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Add excel-export module: Apache POI 6.0.0 XSSF vs SXSSF under a fixed heap, 1,000,000 rows streamed with StreamingResponseBody, OpenCSV, sheet rolling, temp-file cleanup

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b4VQVEJWetTT1dYzyJ
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asmhatre
2026-10-29 06:18:42 +00:00
co-authored by Claude Sonnet 5.5
parent bded24d929
commit 9b1da079c6
29 changed files with 1113 additions and 0 deletions
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excel-export/output/10-libreoffice.txt
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xssf.xlsx ZIP entry timestamps: [(2026, 10, 29, 11, 46, 52)]
sxssf.xlsx ZIP entry timestamps: [(1980, 0, 0, 0, 0, 0)]
LibreOffice 24.2.7.2 420(Build:2)
xssf.xlsx: LibreOffice loads it; row 2 -> 1,05/30/2025,Chennai,Product-384,20,464.83,9296.6,RETURNED,INV/2025-26/0000001 dispatched via hub 71
sxssf.xlsx: LibreOffice: source file could not be loaded
rezipped.xlsx: LibreOffice loads it; row 2 -> 1,05/30/2025,Chennai,Product-384,20,464.83,9296.6,RETURNED,INV/2025-26/0000001 dispatched via hub 71