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stream_start : when the first listener activates a stream that was inactive. This only applies for streams that use the transcoding cluster: loop channel and transcoding relay stations.
stream_stop : the stream becomes inactive (0 listeners). This only applies for streams that use the transcoding cluster: loop channel and transcoding relay stations.
relay_link_start : The transcoding relay pulls from the source (only in transcoding relays).
relay_link_stop : The transcoding relay stops pulling from the source (only in transcoding relays).
link_metadata : updates and logs the metadata of each playing track.
multi_link_start : When a multi link source is connected (Primary or Failover). Include's the link's name in its details.
multi_link_stop : When a multi link source is disconnected (Primary or Failover). Include's the link's name in its details.
multi_link_swapped : When a multi link is swapped (from Primary to failover or vice versa). This may happen when a priority is disconnected or a higher priority link is connected.
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