DEV: stop logging warning when overriding open scope

ActiveRecord defines automatic scopes for enums, the Poll model defines
an enum for `{open: 1}` this mean Rails wants the scope `Poll.all.open`
to work which in turn means it has to override `open` which is defined
privately.

Rails feature req exists for: https://github.com/rails/rails/issues/34599
which will allow us to define enums without scopes which would resolve this
a lot more cleaner.

config/initializers/100-logster.rb

@@ -50,7 +50,15 @@ if Rails.env.production?
 
     # we handle this cleanly in the message bus middleware
     # no point logging to logster
-    /RateLimiter::LimitExceeded.*/m
+    /RateLimiter::LimitExceeded.*/m,
+
+    # see https://github.com/rails/rails/issues/34599
+    # Poll defines an enum with the value `open` ActiveRecord then attempts
+    # AR then warns cause #open is being redefined, it is already defined
+    # privately in Kernel per: http://ruby-doc.org/core-2.5.3/Kernel.html#method-i-open
+    # Once the rails issue is fixed we can stop this error suppression and stop defining
+    # scopes for the enums
+    /^Creating scope :open\. Overwriting existing method Poll\.open\./,
   ]
 end