BioSync: Collaborative Genomic Sequencing

Design a collaborative web-based platform for genomic researchers to edit DNA sequences containing billions of base pairs simultaneously. The system must support real-time conflict-free editing (like Google Docs but for genomic data), allow for branching/merging of 'sequence versions', and enable researchers to annotate specific gene clusters that might span millions of records. High-resolution audit trails for every single base-pair change are required for regulatory compliance.