fix(test): capture native loopback RTP alongside carrier SIP

deploys/test/nonprod-call-evidence.sh

@@ -91,11 +91,8 @@ require_call_window() {
   fi
 }
 require_call_window
-if [[ "$interface" == any ]]; then
-  default_interface="$(ip route show default 2>/dev/null | awk 'NR == 1 {for (i = 1; i <= NF; i++) if ($i == "dev") {print $(i + 1); exit}}')"
-  [[ -n "$default_interface" ]] && interface="$default_interface"
-fi
-
+# "any" includes both provider SIP and the local Asterisk ExternalMedia RTP.
+# Reducing it to the default-route NIC silently omits loopback media.
 if [[ -z "$evidence_dir" ]]; then
   evidence_dir="/var/lib/sip-go-agent/evidence/$call_id"
 fi