Fold asterisk-digital-ocean into asterisk with droplet auto-detection

services/asterisk-digital-ocean.sh was a near-verbatim copy of
services/asterisk.sh — same vendor refresh, compose template, messaging
dialplan, presence alerts, UFW rules and dashboard/trunk chaining, with the
helper functions renamed _asterisk_do_*. Two copies meant every fix had to
land twice, and several never did.

There is now one `asterisk` service. It reads the DigitalOcean metadata
service and asks either way (so a droplet with metadata blocked, or another
provider's public VM, can still opt in), then gates the genuinely
droplet-specific behaviour on that one answer: swapfile for low-RAM plans,
public-FQDN-only setup with no LAN/VLAN prompts, a Caddy site block pinned
to that FQDN, the remote-Authelia option, and the doctl Cloud Firewall.

Two things that were droplet-only for no real reason now apply everywhere:
the entrypoint patch that writes security-level events to logs/full, and
the logrotate config for that file. Without them the Security Dashboard's
Security Log tab and CrowdSec's Asterisk acquisition were silently empty on
every home/LAN install; crowdsec.sh now detects either install directory.

Existing droplets are left alone: an install at ~/docker/asterisk-digital-ocean
keeps its directory and easy-asterisk-do container names, since its Caddyfile
block, UFW rules, Cloud Firewall, CrowdSec acquisition and PSTN trunk all
name those exactly. New installs use ~/docker/asterisk / easy-asterisk.
`sudo ./setup.sh asterisk-digital-ocean` still works via a new SERVICE_ALIAS
map in setup.sh, without a second menu entry.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NAddJGE1G6eGaPzmScG5Vh

services/authelia.sh

@@ -435,7 +435,7 @@ auth.${AUTHELIA_DOMAIN} {
     # own incoming request (always auth.${AUTHELIA_DOMAIN} itself) and
     # overwrites the value a forward_auth caller (e.g. a remote site's
     # "forward_auth https://auth.${AUTHELIA_DOMAIN}" block, see
-    # services/asterisk-digital-ocean.sh) set for its own domain. Confirmed
+    # services/asterisk.sh's droplet-mode Caddy block) set for its own domain. Confirmed
     # live: every forward-auth check evaluated as if it were for
     # auth.${AUTHELIA_DOMAIN} itself (which has policy: bypass in
     # access_control.rules so its own login portal isn't gated behind