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/gluttony/services/bluemap.nix

@@ -82,6 +82,15 @@ in {
   };
 
   systemd.services."render-bluemap-maps" = {
+    after = [
+      "sops-install-secrets.service"
+      "network-online.target"
+    ];
+    requires = [
+      "sops-install-secrets.service"
+      "network-online.target"
+    ];
+
     serviceConfig = {
       StateDirectory = [ "bluemap/world" ];
       ExecStartPre = let