feat(uniprot,domains): reviewed/organism filters + debounce/fast-path, PROSITE raw-sequence scan UI (3c,3d)

test: comprehensive validation & fuzz testing with bug fixes

fix: case-insensitive accession lookup - normalize to uppercase at entry points

fix: BLAST pipeline crash — accession misclassification + missing error handling

feat: add DNA sequence output across BLAST, UniProt, sequencing, primers, and SequenceRetrieval

fix: UniProt API sequence key is value not sequence -- confirmed via API response

fix: UniprotTool missing sequence field — empty sequence in fetchSequence for UniProt accessions

Initial commit: Bio Nexus pipeline engine — BLAST + UniProt + AlphaFold + AI interpretation (Phase 1)