Hardening Workers KV

What this post added

This post details recent incidents impacting Workers KV, highlighting issues with its new architecture, deployment processes, and observability gaps. It outlines the root causes, including an observability gap in error reporting and a mutation to local state that resulted in an unexpected mutation of global state. The post also discusses the challenges encountered during progressive rollouts and the impact on specific data centers and regions. It concludes by emphasizing the need for improved deployment strategies, enhanced observability, and a more robust approach to handling unhandled exceptions and state mutations in Workers.