Function validate_file_content 

pub fn validate_file_content(
    content: &[u8],
    expected_text: bool,
) -> Result<(), ValidationError>

Validate that file content is not malicious or malformed

Basic security checks for file content integrity:

• Minimum size requirements
• Binary content detection for text formats
• Basic malformation checks

Errors

Returns ValidationError::InvalidFileContent if the content is too small, contains unexpected binary data for text formats, or fails UTF-8 validation.