might work

deps.edn

@@ -10,8 +10,10 @@
  :deps
  {;; Application
   org.clojure/clojure {:mvn/version "1.11.4"}
-  org.clojure/spec.alpha {:mvn/version "0.5.238"}
-  orchestra/orchestra {:mvn/version "2021.01.01-1"}}
+  org.babashka/spec.alpha {:git/url "https://github.com/babashka/spec.alpha"
+                           :git/sha "79e7daaead944583eece42ff5665be208d019861"}
+  orchestra/orchestra {:mvn/version "2021.01.01-1"}
+  babashka/babashka.curl {:mvn/version "0.1.2"}}
  ;; ---------------------------------------------------------
 
  ;; ---------------------------------------------------------

src/dda/backup/monitoring.clj

@@ -0,0 +1,11 @@
+(ns dda.backup.monitoring
+  (:require
+   [dda.backup.monitoring.domain :as d]
+   [orchestra.core :refer [defn-spec]]))
+
+(defn-spec send-monitoring any?
+  [config ::d/monitoring-config]
+  (curl/post 
+   "http://pushgateway:9091/metrics/job/backup" 
+   {:headers {"Content-Type" "application/json; schema=\"prometheus/telemetry\"; version=\"0.0.2\""}
+    :body (d/monitoring-data config)}))

tests.edn

@@ -10,4 +10,16 @@
 
 ;; ---------------------------------------------------------
 
-#kaocha/v1 {}
+#kaocha/v1 {:plugins [:orchestra
+                      :kaocha.plugin.alpha/info
+                      :profiling
+                      :print-invocations
+                      :hooks
+                      :notifier
+                      :kaocha.plugin/version-filter]
+
+            :kaocha/bindings {kaocha.stacktrace/*stacktrace-filters* []
+                              kaocha.stacktrace/*stacktrace-stop-list* []}
+
+            :reporter kaocha.report/documentation}
+