TheOmenDen.StreamPulse.Scripting.Attributes.OnConnectionFailedAttributeMarks a method as a handler fired when a connection attempt fails (spec 023). Fires once per
outage (the first failed attempt); retries do not re-fire, though the attempt count still increments
internally. Fires for every applicable source; read e.Source to branch. The method must accept
(IScriptContext, ConnectionHealthContext). See OnChatMessageAttribute for the
supported return types.