♻️ Refactor cocurrency model on backend

Mainly the followin changes:

- Pass majority of code to the old and plain synchronous style
  and start using virtual threads for the RPC (and partially some
  HTTP server middlewares).
- Make some improvements on how CLIMIT is handled, simplifying code
- Improve considerably performance reducing the reflection and
  unnecesary funcion calls on the whole stack-trace of an RPC call.
- Improve efficiency reducing considerably the total threads number.

backend/src/app/rpc/commands/audit.clj

@@ -21,10 +21,7 @@
    [app.rpc.helpers :as rph]
    [app.util.services :as sv]
    [app.util.time :as dt]
-   [app.worker :as wrk]
-   [clojure.spec.alpha :as s]
-   [promesa.core :as p]
-   [promesa.exec :as px]))
+   [clojure.spec.alpha :as s]))
 
 (defn- event->row [event]
   [(uuid/next)
@@ -71,17 +68,22 @@
           :req-un [::events]))
 
 (sv/defmethod ::push-audit-events
-  {::climit/queue :push-audit-events
+  {::climit/id :submit-audit-events-by-profile
    ::climit/key-fn ::rpc/profile-id
    ::audit/skip true
    ::doc/added "1.17"}
-  [{:keys [::db/pool ::wrk/executor] :as cfg} params]
+  [{:keys [::db/pool] :as cfg} params]
   (if (or (db/read-only? pool)
           (not (contains? cf/flags :audit-log)))
     (do
       (l/warn :hint "audit: http handler disabled or db is read-only")
       (rph/wrap nil))
 
-    (->> (px/submit! executor #(handle-events cfg params))
-         (p/fmap (constantly nil)))))
+    (do
+      (try
+        (handle-events cfg params)
+        (catch Throwable cause
+          (l/error :hint "unexpected error on persisting audit events from frontend"
+                   :cause cause)))
 
+      (rph/wrap nil))))