attachable bytes

[laf-rge]

Add support for byte stream attachments

This PR adds support for attaching files using byte streams alongside the existing file path method.

Fixes #368

Changes

• Added _FileBytes attribute to the Attachable class to support byte stream attachments
• Updated make_request in QuickBooks client to handle file bytes
• Added validation to ensure only one of _FilePath or _FileBytes is used at a time
• Added new integration test test_create_file_from_bytes to verify functionality
• Updated documentation with examples of the new byte stream attachment method

Example Usage

python attachment = Attachable() attachment.FileName = 'document.pdf' attachment.FileBytes = pdf_bytes # bytes object containing file content attachment.ContentType = 'application/pdf' attachment.save(qb=client)

Benefits

• Enables direct attachment of in-memory file content without writing to disk
• Useful for handling file uploads, generated PDFs, and other byte stream content
• Maintains backward compatibility with existing file path method

Testing

• Added integration test verifying byte stream attachment functionality
• Existing file path attachment tests continue to pass
• All integration tests passing except for unrelated Account test failures

Documentation

• Added new section in README.md demonstrating byte stream attachment usage
• Added note clarifying mutual exclusivity of _FilePath and _FileBytes