Refactor common modules.

hosts/c1/default.nix

@@ -3,7 +3,10 @@
   imports = [
     ../../common/encrypted-btrfs-layout.nix
     ../../common/global
-    ../../common/compute-node.nix
+    ../../common/cluster-member.nix  # Consul + storage clients
+    ../../common/nomad-worker.nix     # Nomad client (runs jobs)
+    ../../common/nomad-server.nix     # Consul + Nomad server mode
+    ../../common/glusterfs.nix        # GlusterFS server (temp during migration)
     ../../common/nfs-services-standby.nix  # NFS standby for /data/services
     # To promote to NFS server (during failover):
     # 1. Follow procedure in docs/NFS_FAILOVER.md