Feature: Microsoft Office (OLE2) format support

[coderabbitai]

Overview

Add support for legacy Microsoft Office formats (DOC, XLS, PPT) using OLE2 Compound File Binary Format.

Parent Epic

Part of #91 - Document & Office Format Awareness

Description

Parse OLE2 structured storage to extract document properties, embedded text, and metadata from legacy Office files.

Implementation Details

• Use cfb crate for OLE2 parsing
• Extract Document Summary Information
• Parse specific streams (WordDocument, Workbook, PowerPoint)
• Handle embedded objects
• Extract VBA macro code (as strings, not execute)

String Sources

• Document properties (title, author, company, keywords)
• Summary information
• Embedded text (where accessible)
• VBA macro source code
• Hyperlinks
• Embedded object metadata

Acceptance Criteria

• Parse OLE2 structure
• Extract document properties
• Identify DOC, XLS, PPT streams
• Extract accessible text
• Handle VBA macro storage
• Skip binary data sections
• Tests with Office 97-2003 files

Note

Modern Office files (DOCX, XLSX, PPTX) are ZIP-based and covered in Phase 2.

Related

Project: #76

[traycerai]

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