sops: the combined cc-ci host's ssh host key is a recipient (secrets submodule bumped)

cc-ci-secrets now encrypts to the new host (195.201.88.249) via its own
ssh-host-key-derived age identity, like the canonical cc-ci did, so the
off-box master recovery key no longer has to live on that box —
/var/lib/sops-nix/key.txt there holds the host-derived identity instead.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FqkQq3CDmFWcQ7u1LzoyRz

.sops.yaml

@@ -5,10 +5,12 @@
 #            /srv/cc-ci/.sops/master-age.txt (never in this repo). Lets us re-key if cc-ci is lost.
 keys:
   - &host   age1h90utdztfc23kx8ewrtrtk80mnddvrf8pg4ppej55rwwwupzhfvqhmp3qa
+  - &host2  age1tmvgpgc822ezqgxg4x8h6ndph6j9hwpgjpg364zn7lw3t5h694rq5730wa
   - &master age1cmk26t9e30ls8594s8txgmf2exenydmntfxqpcd3qdqm3ru2lpnqpdkdz9
 creation_rules:
   - path_regex: secrets/.*\.(yaml|json|env)$
     key_groups:
       - age:
           - *host
+          - *host2
           - *master

nix/modules/acme-dns.nix

@@ -60,24 +60,18 @@ in
 
   environment.etc."acme-dns/lego.env".source = legoEnvironment;
 
+  # The staging order has completed successfully. This marker permits the
+  # production ACME post-run hook to hand a renewed certificate to Traefik.
+  systemd.tmpfiles.rules = [
+    "f /var/lib/ci-certs/acme-production-enabled 0600 root root -"
+  ];
 
   networking.firewall = {
     allowedTCPPorts = [ 53 ];
     allowedUDPPorts = [ 53 ];
   };
 
-
+  systemd.services.acme-dns = {
-
-  # One `systemd` attrset (statix W20): the tmpfiles marker, the acme-dns daemon and the
-  # traefik handoff oneshot.
-  systemd = {
-    # The staging order has completed successfully. This marker permits the
-    # production ACME post-run hook to hand a renewed certificate to Traefik.
-    tmpfiles.rules = [
-      "f /var/lib/ci-certs/acme-production-enabled 0600 root root -"
-    ];
-
-    services.acme-dns = {
     description = "Restricted authoritative DNS for cc-ci ACME DNS-01";
     wantedBy = [ "multi-user.target" ];
     after = [ "network-online.target" ];
@@ -106,7 +100,7 @@ in
   # Traefik consumes its wildcard as immutable Swarm secrets, so a renewed
   # host certificate must be copied and reconciled rather than merely reloaded.
   # This service is started only by the production-mode ACME postRun hook.
-    services.cc-ci-acme-traefik-handoff = {
+  systemd.services.cc-ci-acme-traefik-handoff = {
     description = "Install renewed cc-ci wildcard into Traefik Swarm secrets";
     after = [ "docker.service" "deploy-proxy.service" ];
     requires = [ "docker.service" ];
@@ -140,7 +134,6 @@ in
         while IFS= read -r stale; do docker secret rm "$stale" || true; done
     '';
   };
-  };
 
   security.acme = {
     acceptTerms = true;