feat: restart heracles if the config file changes

nix/base-system/darwin-configuration.nix

@@ -81,7 +81,7 @@
                             query = ''
                               sum by (job,instance, mode)(irate(node_cpu_seconds_total{mode!="idle"}[5m]))
                               / ignoring(mode) group_left
-                              sum by (job,instance)(irate(node_cpu_seconds_total{mode!="idle"}[5m]))
+                              sum by (job,instance)(irate(node_cpu_seconds_total[5m]))
                             '';
                             meta = {
                                 name_format = "`\${labels.instance} - \${labels.mode}`";

nix/base-system/modules/darwin-monitor.nix

@@ -102,6 +102,9 @@ with lib;
                     "--listen=${config.services.heracles.listen}"
                     "--config=/etc/${config.environment.etc."heracles.yaml".target}"
                 ];
+                WatchPaths = [
+                    "/etc/${config.environment.etc."heracles.yaml".target}"
+                ];
                 KeepAlive = true;
                 RunAtLoad = true;
             };