EchoInjectActivityId adds X-Seq-Activity-Id HTTP header and 'activityId' in the current Echo context, useful for logging and tracing.

Init must be called explicitly before the global L variable points to a valid *zap.Logger instance.

RecoverWithZapLogging is a replacement for the default middleware.Recover() which prints only to echo's default logger (which is obviously not Zap).

ZapLoggerForEcho is a middleware and zap to provide an "access log" logging for each request.