treewide: add missing systemd ordering directives

In particular, we were missing `sops-install-secrets.service` in a ton
of places, and `network-online.target` for some homebrewn services.

This has caused failure of some services on machine startup.

hosts/kommode/services/gitea/gpg.nix

@@ -32,7 +32,11 @@ in
 
   systemd.services.gitea-ensure-gnupg-homedir = {
     description = "Import gpg key for gitea";
+
     before = [ "gitea.service" ];
+    after = [ "sops-install-secrets.service" ];
+    requires = [ "sops-install-secrets.service" ];
+
     environment = { inherit GNUPGHOME; };
     serviceConfig = {
       Type = "oneshot";