remove stale promtail/rc.d leftovers, rss DNS record, fix london-c host description

- ansible/services/promtail/ - replaced by Grafana Alloy ages ago, nothing
  references it
- ansible/services/rc.d/london-a/ - FreeBSD rc.conf from before london-a
  was repaved as Proxmox
- rss A record in dns.tf - Miniflux was decommissioned in #127, the Caddy
  block is long gone but the record stayed behind
- london-c host_vars still said idle/available - it runs the Octopus
  exporter

ansible/inventory/host_vars/london-c.yml

@@ -1,6 +1,6 @@
 ---
-host_role: idle
-host_description: "Idle/available"
+host_role: utility
+host_description: "Octopus Energy exporter, edge utility box"
 host_location: "London"
 prometheus_location: london
 

ansible/services/promtail/config/london-b.yml

@@ -1,32 +0,0 @@
----
-server:
-  http_listen_port: 9080
-  grpc_listen_port: 0
-
-positions:
-  filename: /tmp/positions.yaml
-
-clients:
-  - url: http://192.168.1.254:3100/loki/api/v1/push
-
-scrape_configs:
-  - job_name: london-b
-    static_configs:
-      - targets:
-          - localhost
-        labels:
-          job: varlogs
-          instance: london-b
-          __path__: /var/log/*log
-      - targets:
-          - localhost
-        labels:
-          job: plex
-          instance: london-b
-          __path__: /var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Logs/*log
-      - targets:
-          - localhost
-        labels:
-          job: jellyfin
-          instance: london-b
-          __path__: /var/log/jellyfin/*log

ansible/services/promtail/promtail.service

@@ -1,14 +0,0 @@
-[Unit]
-Description=Promtail service
-After=network.target
-
-[Service]
-Type=simple
-User=root
-ExecStart=/usr/bin/promtail -config.file /etc/promtail/config.yml
-TimeoutSec=60
-Restart=on-failure
-RestartSec=2
-
-[Install]
-WantedBy=multi-user.target

ansible/services/rc.d/london-a/rc.conf

@@ -1,24 +0,0 @@
-# /etc/rc.conf — london-a (FreeBSD)
-# Captured 2026-03-22
-
-clear_tmp_enable="YES"
-hostname="london-a"
-ifconfig_em0="inet 192.168.1.254 netmask 255.255.255.0"
-defaultrouter="192.168.1.1"
-ifconfig_em0_ipv6="inet6 accept_rtadv"
-sshd_enable="YES"
-ntpd_enable="YES"
-powerd_enable="YES"
-moused_nondefault_enable="NO"
-# Set dumpdev to "AUTO" to enable crash dumps, "NO" to disable
-dumpdev="AUTO"
-zfs_enable="YES"
-grafana_enable="YES"
-prometheus_enable="YES"
-node_exporter_enable="YES"
-tailscaled_enable="YES"
-influxd_enable="NO"
-libvirtd_enable="NO"
-redis_enable="NO"
-postgresql_enable="NO"
-node_exporter_listen_address="100.122.219.41:9100"

terraform/hetzner/dns.tf

@@ -16,7 +16,7 @@ resource "hcloud_zone_rrset" "A_helsinki_a" {
     "@", "apps", "auth", "bitwarden", "download", "git", "helsinki-a",
     "jellyfin", "jellyfin-requests", "ldap", "lidarr", "london-a", "music", "naveen",
     "plex", "prowlarr", "radarr", "readarr", "request",
-    "rss", "sonarr", "soulseek", "status",
+    "sonarr", "soulseek", "status",
   ])
   zone    = hcloud_zone.pezsh.name
   name    = each.value