log at start of send_notification before potential errors

Author: yasunariw

lib/api_remote.ml

@@ -55,6 +55,7 @@ module Slack : Api.Slack = struct
   (** `send_notification ctx msg` notifies `msg.channel` with the payload `msg`;
       uses web API with access token if available, or with webhook otherwise *)
   let send_notification ~(ctx : Context.t) ~(msg : Slack_t.post_message_req) =
+    log#info "sending to %s" msg.channel;
     let build_error e = fmt_error "%s\nfailed to send Slack notification" e in
     let build_query_error url e = build_error @@ sprintf "error while querying %s: %s" url e in
     let secrets = Context.get_secrets_exn ctx in
@@ -68,7 +69,7 @@ module Slack : Api.Slack = struct
     | Some url ->
       let data = Slack_j.string_of_post_message_req msg in
       let body = `Raw ("application/json", data) in
-      log#info "sending to %s : %s" msg.channel data;
+      log#info "data: %s" data;
       ( match%lwt http_request ~body ~headers `POST url with
       (* error detection in response: slack uses status codes for webhooks versus a 200 code w/ `error` field for web api *)
       | Ok s ->