NTRIP caster HA patterns
BKG’s caster fans GNSS streams but won’t fail over. Prove a normal relay-IPort first, then bolt on dual-AZ L4 and multi-region DNS — one stack at a time.
The binary never grew a cluster mode — only the recovery plane changes. Work baseline → dual-AZ (~20–40s gap) → multi-region DNS (minute-scale), and tear each stack down before the next.