V49: Shop Import Enhancements

Adds option_mappings to import_configs and product_ids to import_logs for enhanced CSV import functionality.

Changes

• Adds option_mappings JSONB column to import_configs for storing CSV option to global option mappings configuration
• Adds product_ids INTEGER[] column to import_logs for tracking which products were created/updated during a CSV import

option_mappings Structure

[
  {
    "csv_name": "Cup Color",
    "slot_key": "cup_color",
    "source_key": "color",
    "auto_add": true,
    "label": {"en": "Cup Color", "ru": "Цвет чашки"}
  }
]