fix: include UE location in N2 handover complete notification to SMF

When AMF sends UpdateSmContext with HoState=COMPLETED to SMF after
N2 handover, include the UE's current location (ueLocation) in the
request body so SMF can report the access network change to PCF via
the AN_CH_COR trigger per TS 29.512.

Previously, ueLocation was omitted from the COMPLETED notification,
preventing SMF from accurately reporting the post-handover UE location
to PCF for policy updates.

Author: timyl

internal/sbi/consumer/smf_service.go

@@ -395,6 +395,7 @@ func (s *nsmfService) SendUpdateSmContextN2HandoverComplete(
 ) {
 	updateData := models.SmfPduSessionSmContextUpdateData{}
 	updateData.HoState = models.HoState_COMPLETED
+	updateData.UeLocation = &ue.Location
 	if amfid != "" {
 		updateData.ServingNfId = amfid
 		updateData.ServingNetwork = guami.PlmnId