chore: 并入 iotlcm-worker-svr 历史到 worker-svr/（原提交 96f0f4e）

worker-svr/internal/library/rabbitmq/delivery.go

@@ -0,0 +1,22 @@
+package rabbitmq
+
+import "context"
+
+type DeliveryMetadata struct {
+	DeliveryTag uint64
+	Redelivered bool
+	Consumer    string
+	Queue       string
+	Headers     map[string]any
+}
+
+type deliveryMetadataContextKey struct{}
+
+func WithDeliveryMetadata(ctx context.Context, metadata DeliveryMetadata) context.Context {
+	return context.WithValue(ctx, deliveryMetadataContextKey{}, metadata)
+}
+
+func DeliveryMetadataFromContext(ctx context.Context) (DeliveryMetadata, bool) {
+	metadata, ok := ctx.Value(deliveryMetadataContextKey{}).(DeliveryMetadata)
+	return metadata, ok
+}