move the small per-service host options to deploy.<service>

nix/host-modules/swarm-otel-service.nix

@@ -50,20 +50,6 @@ in
       '';
     };
 
-    telemetryPort = lib.mkOption {
-      type = lib.types.port;
-      default = 8889;
-      description = ''
-        Port this collector serves its **own** metrics on — queue depth,
-        refused and dropped samples, exporter failures. How you find out
-        that telemetry is being lost, so it is worth keeping rather than
-        switching off.
-
-        Bound on the container's own loopback, so no other collector
-        shares it; only this collector scrapes it.
-      '';
-    };
-
     serviceProducers = lib.mkOption {
       internal = true;
       type = lib.types.attrsOf (