add telephony to reporter

Signed-off-by: shishir gowda <[email protected]>

Author: shishirng

observability/reporter.go

@@ -4,6 +4,7 @@ import (
 	"github.com/livekit/protocol/observability/agentsobs"
 	"github.com/livekit/protocol/observability/gatewayobs"
 	"github.com/livekit/protocol/observability/roomobs"
+	"github.com/livekit/protocol/observability/telephonyobs"
 )
 
 const Project = "livekit"
@@ -12,6 +13,7 @@ type Reporter interface {
 	Room() roomobs.Reporter
 	Agent() agentsobs.Reporter
 	Gateway() gatewayobs.Reporter
+	Telephony() telephonyobs.Reporter
 	Close()
 }
 
@@ -33,4 +35,8 @@ func (reporter) Gateway() gatewayobs.Reporter {
 	return gatewayobs.NewNoopReporter()
 }
 
+func (reporter) Telephony() telephonyobs.Reporter {
+	return telephonyobs.NewNoopReporter()
+}
+
 func (reporter) Close() {}