Replace Makara with an initial Rails 6 role based splitting method.

app/controllers/api/v1/timelines/explore_controller.rb

@@ -39,7 +39,11 @@ class Api::V1::Timelines::ExploreController < Api::BaseController
   end
 
   def cached_explore_statuses
-    cache_collection explore_statuses, Status
+    es = nil
+    ActiveRecord::Base.connected_to(role: :reading) do
+      es = cache_collection explore_statuses, Status
+    end
+    es
   end
 
   def explore_statuses

app/controllers/api/v1/timelines/group_collection_controller.rb

@@ -56,7 +56,11 @@ class Api::V1::Timelines::GroupCollectionController < Api::BaseController
   end
 
   def cached_group_collection_statuses
-    cache_collection group_collection_statuses, Status
+    gcs = nil
+    ActiveRecord::Base.connected_to(role: :reading) do
+      gcs = cache_collection group_collection_statuses, Status
+    end
+    gcs
   end
 
   def group_collection_statuses

app/controllers/api/v1/timelines/group_controller.rb

@@ -46,7 +46,11 @@ class Api::V1::Timelines::GroupController < Api::BaseController
   end
 
   def cached_group_statuses
-    cache_collection group_statuses, Status
+    gs = nil
+    ActiveRecord::Base.connected_to(role: :reading) do
+      gs = cache_collection group_statuses, Status
+    end
+    gs
   end
 
   def group_statuses

app/controllers/api/v1/timelines/pro_controller.rb

@@ -16,7 +16,11 @@ class Api::V1::Timelines::ProController < Api::BaseController
   end
 
   def cached_pro_statuses
-    cache_collection pro_statuses, Status
+    ps = nil
+    ActiveRecord::Base.connected_to(role: :reading) do
+      ps = cache_collection pro_statuses, Status
+    end
+    ps
   end
 
   def pro_statuses