[#2040] node: Attach original meta to the spawned requests

Do not lose meta information of the original requests: cache session and
bearer tokens of the original request b/w a new generated ones. Middle
request wrappers should not contain any meta information, since it is
useless (e.g. ACL service checks only the original tokens).

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

CHANGELOG.md

@@ -26,6 +26,7 @@ Changelog for NeoFS Node
 - Fix concurrent map writes in `Object.Put` service (#2037)
 - Malformed request errors' reasons in the responses (#2028)
 - Session token's IAT and NBF checks in ACL service (#2028)
+- Losing meta information on request forwarding (#2040)
 
 ### Removed
 ### Updated

pkg/services/object/util/prm.go

@@ -102,6 +102,12 @@ func CommonPrmFromV2(req interface {
 	GetMetaHeader() *session.RequestMetaHeader
 }) (*CommonPrm, error) {
 	meta := req.GetMetaHeader()
+	ttl := meta.GetTTL()
+
+	// unwrap meta header to get original request meta information
+	for meta.GetOrigin() != nil {
+		meta = meta.GetOrigin()
+	}
 
 	var tokenSession *sessionsdk.Object
 	var err error
@@ -116,7 +122,6 @@ func CommonPrmFromV2(req interface {
 	}
 
 	xHdrs := meta.GetXHeaders()
-	ttl := meta.GetTTL()
 
 	prm := &CommonPrm{
 		local: ttl <= maxLocalTTL,