transform queries to add comments

ActiveRecord::QueryLogs was introduced
[here](rails/rails@2408615).
Then Rails decided to delegate query transformation responsability to
each adapter
[here](rails/rails@12cc24a)

Author: mgrunberg

lib/active_record/connection_adapters/sqlserver/database_statements.rb

@@ -12,6 +12,7 @@ def write_query?(sql) # :nodoc:
         end
 
         def execute(sql, name = nil)
+          sql = transform_query(sql)
           if preventing_writes? && write_query?(sql)
             raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}"
           end
@@ -27,6 +28,7 @@ def execute(sql, name = nil)
         end
 
         def exec_query(sql, name = "SQL", binds = [], prepare: false, async: false)
+          sql = transform_query(sql)
           if preventing_writes? && write_query?(sql)
             raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}"
           end