⬇️ Downgrade prometheus client to 0.9.0.

Because it introduces some breaking changes.

backend/src/app/db.clj

@@ -80,7 +80,7 @@
     #'next.jdbc/execute!]
    {:registry registry
     :type :counter
-    :name "database_query_count"
+    :name "database_query_total"
     :help "An absolute counter of database queries."}))
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

backend/src/app/http/session.clj

@@ -137,7 +137,7 @@
              (str (:max-batch-size cfg)))
   (let [input (batch-events cfg (::events-ch session))
         mcnt  (mtx/create
-               {:name "http_session_updater_count"
+               {:name "http_session_update_total"
                 :help "A counter of session update batch events."
                 :registry (:registry metrics)
                 :type :counter})]

backend/src/app/notifications.clj

@@ -55,7 +55,7 @@
 
         mtx-messages
         (mtx/create
-         {:name "websocket_message_count"
+         {:name "websocket_message_total"
           :registry (:registry metrics)
           :labels ["op"]
           :type :counter

backend/src/app/tasks.clj

@@ -54,8 +54,8 @@
    {:registry registry
     :type :counter
     :labels ["name"]
-    :name "tasks_submit_counter"
-    :help "An absolute counter of task submissions."
+    :name "tasks_submit_total"
+    :help "A counter of task submissions."
     :wrap (fn [rootf mobj]
             (let [mdata (meta rootf)
                   origf (::original mdata rootf)]