chore(deps): bump mammoth from 1.8.0 to 1.11.0 in /backend

[dependabot]

Bumps mammoth from 1.8.0 to 1.11.0.

Changelog

Sourced from mammoth's changelog.

1.11.0

• Ignore style definitions using a style ID that has already been used.

• Fix conversion of unmerged table cells.

• Disable external file accesses by default. External file access can be enabled using the external_file_access argument.

• Handle numbering levels defined without an index.

1.10.0

• Add "Heading" and "Body" styles, as found in documents created by Apple Pages, to the default style map.

• Handle structured document tags representing checkboxes wrapped in other elements, such as table cells. Previously, the wrapping elements would have been ignored.

• Ignore deleted table rows.

• Add notes on security.

1.9.1

• Ignore AlternateContent elements when there is no Fallback element.

1.9.0

• Detect checkboxes, both as complex fields and structured document tags, and convert them to checkbox inputs.

• Ignore AlternateContent elements when there is no Fallback element.

Commits

• 574ca4b Bump version to 1.11.0
• 750a5bd Disable external file access by default
• a828b00 Avoid duplicating default level index
• 82bc0fe Handle numbering levels defined without an index
• 8216e5a Recommend external_file_access=False with untrusted user input
• 676581c Move external_file_access docs into docs for arguments
• 150bf98 Support disabling external file access
• 603f8b8 Create files once
• 7b4f0c0 Use document transform for safer removal of unmerged table cells
• aa583d3 Test reading of table cells when non-cells are present
• Additional commits viewable in compare view

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[github-actions]

🔍 Code Review Checklist

Please ensure the following before merging:

Functionality

• Code implements the intended feature/fix
• No breaking changes (or properly documented)
• Error handling is appropriate
• Edge cases are considered

Code Quality

• Code is readable and well-structured
• No code duplication
• Functions/classes have single responsibility
• Variable/function names are descriptive

Testing

• Tests are included (if applicable)
• All tests pass
• Manual testing completed

Security

• No sensitive data hardcoded
• Input validation present
• SQL injection prevention (using ORM)
• Authentication/authorization checked

Documentation

• Code comments where necessary
• API documentation updated
• README updated (if needed)
• Migration instructions provided

Database

• Migration script tested
• Backward compatibility considered
• Indexes added for performance

Performance

• No obvious performance issues
• Database queries optimized
• Proper pagination for lists

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