refactor: reorganize server modules

- Moved each individual service definition into a dedicated `services/`
  directory under every server module (e.g.
`modules/servers/bragi/services/`).
- Updated the corresponding `default.nix` files to import the renamed
  service modules from the new location.
- Applied the same changes across all server modules, ensuring
  the API and import paths remain consistent.

modules/servers/odin/services/miniflux.nix

@@ -0,0 +1,38 @@
+{config, ...}: {
+  services.miniflux = {
+    enable = true;
+    config = {
+      LISTEN_ADDR = "127.0.0.1:8000";
+      BASE_URL = "https://feed.cronyakatsuki.xyz";
+      FETCH_YOUTUBE_WATCH_TIME = "1";
+    };
+    adminCredentialsFile = "${config.age.secrets.miniflux.path}";
+  };
+
+  services.traefik.dynamicConfigOptions.http = {
+    services.miniflux.loadBalancer.servers = [
+      {
+        url = "http://localhost:8000";
+      }
+    ];
+
+    routers.miniflux = {
+      rule = "Host(`feed.cronyakatsuki.xyz`)";
+      tls = {
+        certResolver = "porkbun";
+      };
+      service = "miniflux";
+      entrypoints = "websecure";
+    };
+  };
+
+  services.postgresqlBackup = {
+    enable = true;
+    databases = ["miniflux"];
+  };
+
+  services.restic.backups = {
+    local.paths = ["/var/backup/postgresql"];
+    server.paths = ["/var/backup/postgresql"];
+  };
+}