mir-backend-go-echo

Make It Right (Echo module). Echo web framework reliability augmentation for Go backends, covering Echo v5 (current) and v4 (maintained). Chains: mir-backend (generic gates) -> mir-backend-go (Go runtime) -> this (Echo library mechanics). Adds the mechanical footguns the runtime-agnostic tiers omit: echo.Context comes from a sync.Pool and must never be retained past the handler or handed to a goroutine; the v4->v5…