Safety data sheets go straight to the document

Sigma-Aldrich and Merck links now land on the exact product and SDS page instead of a search results list, and open in a fraction of a second. Alfa Aesar, Acros Organics, Innovating Science, Hanna Instruments and Formlabs bottles get a real safety data sheet link for the first time. The scheduled verifier now backfills every current supplier product in bounded batches, while GitHub Actions fully transcribes confirmed PDFs and browser-captured Sigma SDS snapshots across all 16 standard sections for future enrichment.