fix: map remaining livekit.DisconnectReason to SDK's DisconnectReason

A few entries in livekit.DisconnectReason are not explicitly mapped to
the SDK's DisconnectReason. This causes them to be flagged as
"OtherReason", even though some of them could be useful if explicitly
mapped. i.e.: ROOM_DELETED, MIGRATION, SERVER_SHUTDOWN,
CONNECTION_TIMEOUT mean different things and can be treated differently.

Map ROOM_DELETED, MIGRATION and SERVER_SHUTDOWN to unique reasons.
Map CONNECTION_TIMEOUT and SIP_TRUNK_FAILURE to Failed.
The only remaining livekit.DisconnectReason is UKNOWN_REASON, which is
makes sense as OtherReason.

Author: prlanzarin

callback.go

@@ -130,8 +130,11 @@ const (
 	RejectedByUser     DisconnectionReason = "rejected by remote user"
 	Failed             DisconnectionReason = "connection to room failed"
 	RoomClosed         DisconnectionReason = "room closed"
+	RoomDeleted        DisconnectionReason = "room deleted"
 	ParticipantRemoved DisconnectionReason = "removed by server"
 	DuplicateIdentity  DisconnectionReason = "duplicate identity"
+	Migration          DisconnectionReason = "migration"
+	ServerShutdown     DisconnectionReason = "server shutdown"
 	OtherReason        DisconnectionReason = "other reasons"
 )
 
@@ -147,11 +150,21 @@ func GetDisconnectionReason(reason livekit.DisconnectReason) DisconnectionReason
 		r = RejectedByUser
 	case livekit.DisconnectReason_ROOM_CLOSED:
 		r = RoomClosed
+	case livekit.DisconnectReason_ROOM_DELETED:
+		r = RoomDeleted
 	case livekit.DisconnectReason_PARTICIPANT_REMOVED:
 		r = ParticipantRemoved
 	case livekit.DisconnectReason_DUPLICATE_IDENTITY:
 		r = DuplicateIdentity
-	case livekit.DisconnectReason_JOIN_FAILURE, livekit.DisconnectReason_SIGNAL_CLOSE, livekit.DisconnectReason_STATE_MISMATCH:
+	case livekit.DisconnectReason_MIGRATION:
+		r = Migration
+	case livekit.DisconnectReason_SERVER_SHUTDOWN:
+		r = ServerShutdown
+	case livekit.DisconnectReason_JOIN_FAILURE,
+		livekit.DisconnectReason_SIGNAL_CLOSE,
+		livekit.DisconnectReason_STATE_MISMATCH,
+		livekit.DisconnectReason_CONNECTION_TIMEOUT,
+		livekit.DisconnectReason_SIP_TRUNK_FAILURE:
 		r = Failed
 	}
 	return r