add ifindex column for show

lib/App/Netdisco/DB/Result/DevicePort.pm

@@ -379,6 +379,14 @@ Returns true if the remote LLDP neighbor has reported Telephone capability.
 
 sub remote_is_phone { return (shift)->get_column('remote_is_phone') }
 
+=head2 ifindex
+
+Returns the interface index (C<ifIndex>) of the port.
+
+=cut
+
+sub ifindex { return (shift)->get_column('ifindex') }
+
 =head2 remote_inventory
 
 Returns a synthesized description of the remote LLDP device if inventory

lib/App/Netdisco/DB/ResultSet/DevicePort.pm

@@ -136,6 +136,8 @@ will add the following additional synthesized columns to the result set:
 
 =item remote_is_phone (boolean)
 
+=item ifindex
+
 =back
 
 =cut
@@ -152,10 +154,12 @@ sub with_properties {
           properties.remote_is_discoverable
           properties.remote_is_wap
           properties.remote_is_phone
+          properties.ifindex
         /],
         '+as' => [qw/
           error_disable_cause
           remote_is_discoverable remote_is_wap remote_is_phone
+          ifindex
         /],
         join => 'properties',
       });