Take tesla telemetry

lib/pleroma/http.ex

@@ -65,7 +65,7 @@ def request(method, url, body, headers, options) when is_binary(url) do
     options = put_in(options[:adapter], adapter_opts)
     params = options[:params] || []
     request = build_request(method, headers, options, url, body, params)
-    client = Tesla.client([Tesla.Middleware.FollowRedirects])
+    client = Tesla.client([Tesla.Middleware.FollowRedirects, Tesla.Middleware.Telemetry])
 
     request(client, request)
   end

lib/pleroma/web/telemetry.ex

@@ -92,6 +92,17 @@ def metrics do
         reporter_options: [
           buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10]
         ]
+      ),
+      distribution(
+        "tesla_request_completed",
+        event_name: [:tesla, :request, :stop],
+        measurement: :duration,
+        tags: [:response_code],
+        tag_values: fn tags -> Map.put(tags, :response_code, tags.env.status) end,
+        unit: {:native, :second},
+        reporter_options: [
+          buckets: [0.01, 0.025, 0.05, 0.1, 0.2, 0.5, 1, 2.5, 5, 10]
+        ]
       )
     ]
   end