Convex change history: elevated latency/errors for a subset of customers

Convex reported major latency/errors for affected deployments starting 2025-10-30 23:43 UTC, resolved 2025-10-31 07:52 UTC after 8 h 8 min. A downstream-provider issue caused an inefficient database table format; Convex reported rewriting it and shedding load, with sporadic availability issues for a small subset of non-pro customers.