always include default binding for queue bindings

spec/upstream_spec.cr

@@ -403,18 +403,18 @@ describe LavinMQ::Federation::Upstream do
         wait_for { upstream.links.first?.try &.state.running? }
 
         upstream_q = upstream_vhost.queues.values.first
-        upstream_q.bindings.size.should eq queues.size
+        upstream_q.bindings.size.should eq queues.size + 1 # +1 for the default exchange
         # Assert setup is correct
         10.times do |i|
           downstream_q = downstream_ch.queue("")
           downstream_q.bind("downstream_ex", "after.link.#{i}")
           queues << downstream_q
         end
         sleep 0.1.seconds
-        upstream_q.bindings.size.should eq queues.size
+        upstream_q.bindings.size.should eq queues.size + 1
         queues.each &.delete
         sleep 10.milliseconds
-        upstream_q.bindings.size.should eq 0
+        upstream_q.bindings.size.should eq 1
       end
     end
   end

src/lavinmq/http/controller/queues.cr

@@ -134,9 +134,7 @@ module LavinMQ
           with_vhost(context, params) do |vhost|
             refuse_unless_management(context, user(context), vhost)
             queue = queue(context, params, vhost)
-            itr = queue.bindings # .map { |exchange, args| BindingDetails.new(exchange.name, vhost, args[0], args[1], queue) }
-            # default_binding = BindingDetails.new("", queue.vhost.name, queue.name, nil, queue)
-            page(context, itr) # {default_binding}.each.chain(itr))
+            page(context, queue.bindings)
           end
         end
 

src/lavinmq/vhost.cr

@@ -284,9 +284,10 @@ module LavinMQ
     end
 
     def queue_bindings(queue : Queue) : Iterator(BindingDetails)
+      default_binding = BindingDetails.new("", name, BindingKey.new(queue.name), queue)
       @exchanges.each_value.flat_map do |ex|
         ex.bindings_details.select { |binding| binding.destination == queue }
-      end
+      end.chain({default_binding}.each)
     end
 
     def add_operator_policy(name : String, pattern : String, apply_to : String,