Add callback_url/acct information for Sidekiq PuSH workers Exception. (#4281)

* Add destination informations to exception on SubscribeWorker and DeliveryWorker.

* Simplify delivery error message.

* Prevent changing Exception type...

* fix typo.

app/lib/exceptions.rb

@@ -8,11 +8,11 @@ module Mastodon
 
   class UnexpectedResponseError < Error
     def initialize(response = nil)
-      @response = response
-    end
-
-    def to_s
-      "#{@response.uri} returned code #{@response.code}"
+      if response.respond_to? :uri
+        super("#{response.uri} returned code #{response.code}")
+      else
+        super
+      end
     end
   end
 end

app/workers/pubsubhubbub/delivery_worker.rb

@@ -16,6 +16,8 @@ class Pubsubhubbub::DeliveryWorker
     @subscription = Subscription.find(subscription_id)
     @payload = payload
     process_delivery unless blocked_domain?
+  rescue => e
+    raise e.class, "Delivery failed for #{subscription&.callback_url}: #{e.message}"
   end
 
   private

app/workers/pubsubhubbub/subscribe_worker.rb

@@ -22,5 +22,7 @@ class Pubsubhubbub::SubscribeWorker
     account = Account.find(account_id)
     logger.debug "PuSH re-subscribing to #{account.acct}"
     ::SubscribeService.new.call(account)
+  rescue => e
+    raise e.class, "Subscribe failed for #{account&.acct}: #{e.message}"
   end
 end