Rename Asterisk container from easy-asterisk to asterisk

New installs now name the container "asterisk", matching every other
service's container_name == service name convention, instead of
reusing the vendored easy-asterisk CLI tool's own name (which stays
/usr/local/bin/easy-asterisk inside the container, unrelated and
unchanged).

An existing "easy-asterisk" install is never silently renamed: every
place that resolves the container name (_asterisk_resolve_layout in
asterisk.sh, plus the duplicated copies in security-dashboard.sh,
sms-inbound.sh, pstn-trunk.sh, and tools/pstn-test-check.sh's docker ps
detection) now reads it from the box's own docker-compose.yml instead
of assuming it, falling back to "asterisk" only when there's no
existing install to read. Migrating a live box to the new name is a
one-time manual action (edit docker-compose.yml's container_name for
Asterisk and its coturn sidecar, docker compose down + up -d); every
sibling service then picks it up automatically on its next run.

The DigitalOcean-droplet layout (asterisk-digital-ocean directory,
easy-asterisk-do container) is untouched by this - that naming stays
exactly as documented for pre-merge droplet installs.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SpKTLpwAgZNooTacWeQLuc

services/sms-inbound.sh

@@ -53,7 +53,15 @@ _sms_detect_container_name() {
     if [[ "$_ea_dir" == *asterisk-digital-ocean ]]; then
         echo "easy-asterisk-do"
     else
-        echo "easy-asterisk"
+        # Read the box's own container_name instead of assuming — new
+        # installs use plain "asterisk" now, but an existing "easy-asterisk"
+        # install (this repo's container name before that rename) keeps
+        # working unchanged until someone deliberately migrates it. See
+        # services/asterisk.sh's _asterisk_resolve_layout for the reasoning.
+        local _name=""
+        [[ -f "$_ea_dir/docker-compose.yml" ]] && \
+            _name="$(grep -m1 '^[[:space:]]*container_name:' "$_ea_dir/docker-compose.yml" | awk '{print $2}')"
+        echo "${_name:-asterisk}"
     fi
 }