Add == method for auth scheme

hearth/lib/hearth/endpoint_rules.rb

@@ -26,6 +26,11 @@ def initialize(scheme_id:, properties: {})
       # Additional properties of the authentication scheme.
       # @return [Hash]
       attr_accessor :properties
+
+      # @return [Boolean]
+      def ==(other)
+        scheme_id == other.scheme_id && properties == other.properties
+      end
     end
 
     # An Endpoint resolved by an EndpointProvider