Products import from CSV with large count of attributes does not work

Terms

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UnoPim Version(s) affected

0.2.1

Issue Description

Importing products from real working bagisto shop, but very outdated version, 800+ categories, 1000+ attributes because of 300+ attribute families with different attributes sets. CSV import file contains also 1000+ columns. Importer only read 245 columns, due to limitation of $this->columnNames = fgetcsv($this->reader, 4096, $delimiter);

Preconditions

Products import CSV file with large attributes number

Steps to reproduce

1. Go to 'DataTransfer->Imports'
2. Create products Import with that CSV file
3. Start import
4. See error

Expected Result

All products imported with attributes

Actual Result

File processing read only part of columns and import breaks

Screenshots

No response

Additional Context

No response