fix: use at opt

Author: smoke

instrumentation/sidekiq/lib/opentelemetry/instrumentation/sidekiq/middlewares/client/tracer_middleware.rb

@@ -24,7 +24,7 @@ def call(_worker_class, job, _queue, _redis_pool)
               }
               attributes[SemanticConventions::Trace::PEER_SERVICE] = instrumentation_config[:peer_service] if instrumentation_config[:peer_service]
 
-              scheduled_at = job['scheduled_at']
+              scheduled_at = job['at']
               op = scheduled_at.nil? ? "publish" : "scheduled"
 
               span_name = case instrumentation_config[:span_naming]

instrumentation/sidekiq/lib/opentelemetry/instrumentation/sidekiq/middlewares/server/tracer_middleware.rb

@@ -33,7 +33,7 @@ def call(_worker, msg, _queue)
               extracted_context = OpenTelemetry.propagation.extract(msg)
               created_at = time_from_timestamp(msg['created_at'])
               enqueued_at = time_from_timestamp(msg['created_at'])
-              scheduled_at = time_from_timestamp(msg['scheduled_at']) unless msg['scheduled_at'].nil?
+              scheduled_at = time_from_timestamp(msg['at']) unless msg['at'].nil?
               OpenTelemetry::Context.with_current(extracted_context) do
                 if instrumentation_config[:propagation_style] == :child
                   tracer.in_span(span_name, attributes: attributes, kind: :consumer) do |span|