- Add ceidg_api_service.py with fetch_ceidg_by_nip() function
- Add KRSApiService class with search_by_nip() method
- KRS lookup uses rejestr.io API (unofficial) or database fallback
- CEIDG lookup uses official dane.biznes.gov.pl API
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
