fix: Handle application errors in Sentry (#1982)

- Handle notification errors for attachment messages
- Fix empty identifiers being passed
- Fix 404 when invalid source id
- Handle webhook exceptions

app/actions/contact_identify_action.rb

@@ -34,7 +34,9 @@ class ContactIdentifyAction
 
   def update_contact
     custom_attributes = params[:custom_attributes] ? @contact.custom_attributes.merge(params[:custom_attributes]) : @contact.custom_attributes
-    @contact.update!(params.slice(:name, :email, :identifier).merge({ custom_attributes: custom_attributes }))
+    # blank identifier or email will throw unique index error
+    # TODO: replace reject { |_k, v| v.blank? } with compact_blank when rails is upgraded
+    @contact.update!(params.slice(:name, :email, :identifier).reject { |_k, v| v.blank? }.merge({ custom_attributes: custom_attributes }))
     ContactAvatarJob.perform_later(@contact, params[:avatar_url]) if params[:avatar_url].present?
   end