asterisk: load app_directed_pickup, name the group pickup code

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

cookbooks/asterisk/config/etc/features.conf

@@ -1,3 +1,7 @@
 ; Default transfer and pickup settings. The phones transfer with SIP REFER,
 ; handled by res_pjsip_refer, not with DTMF feature codes.
 [general]
+; Dialled by a phone, picks up a call ringing on a phone of its pickup groups
+; (named_pickup_group and named_call_group of pjsip.conf). Handled by chan_pjsip
+; before the dialplan. *8 is the default, written here to be found.
+pickupexten = *8

cookbooks/asterisk/config/etc/modules.conf

@@ -45,6 +45,9 @@ load => codec_a_mu.so
 ; Dialplan
 load => pbx_config.so
 load => app_dial.so
+; Directed pickup: Pickup() and PickupChan(). Group pickup (pickupexten of
+; features.conf, *8 by default) is in the core and chan_pjsip.
+load => app_directed_pickup.so
 load => func_callerid.so
 
 ; "channel originate" from the CLI, to test a phone without a second one