fix: EC volume deletion issues

Fixes #7489

1. Skip cookie check for EC volume deletion when SkipCookieCheck is set
   When batch deleting files from EC volumes with SkipCookieCheck=true
   (e.g., orphan file cleanup), the cookie is not available. The deletion
   was failing with 'unexpected cookie 0' because DeleteEcShardNeedle
   always validated the cookie.

2. Optimize doDeleteNeedleFromAtLeastOneRemoteEcShards to return early
   Return immediately when a deletion succeeds, instead of continuing
   to try all parity shards unnecessarily.

3. Remove useless log message that always logged nil error
   The log at V(1) was logging err after checking it was nil.

Regression introduced in commit 7bdae5172 (Jan 3, 2023) when EC batch
delete support was added.

weed/storage/store_ec_delete.go

@@ -3,6 +3,7 @@ package storage
 import (
 	"context"
 	"fmt"
+
 	"github.com/seaweedfs/seaweedfs/weed/pb"
 
 	"github.com/seaweedfs/seaweedfs/weed/glog"
@@ -21,7 +22,8 @@ func (s *Store) DeleteEcShardNeedle(ecVolume *erasure_coding.EcVolume, n *needle
 		return 0, err
 	}
 
-	if cookie != n.Cookie {
+	// cookie == 0 indicates SkipCookieCheck was requested (e.g., orphan cleanup)
+	if cookie != 0 && cookie != n.Cookie {
 		return 0, fmt.Errorf("unexpected cookie %x", cookie)
 	}
 
@@ -45,22 +47,17 @@ func (s *Store) doDeleteNeedleFromAtLeastOneRemoteEcShards(ecVolume *erasure_cod
 
 	shardId, _ := intervals[0].ToShardIdAndOffset(erasure_coding.ErasureCodingLargeBlockSize, erasure_coding.ErasureCodingSmallBlockSize)
 
-	hasDeletionSuccess := false
 	err = s.doDeleteNeedleFromRemoteEcShardServers(shardId, ecVolume, needleId)
 	if err == nil {
-		hasDeletionSuccess = true
+		return nil
 	}
 
 	for shardId = erasure_coding.DataShardsCount; shardId < erasure_coding.TotalShardsCount; shardId++ {
 		if parityDeletionError := s.doDeleteNeedleFromRemoteEcShardServers(shardId, ecVolume, needleId); parityDeletionError == nil {
-			hasDeletionSuccess = true
+			return nil
 		}
 	}
 
-	if hasDeletionSuccess {
-		return nil
-	}
-
 	return err
 
 }
@@ -77,11 +74,9 @@ func (s *Store) doDeleteNeedleFromRemoteEcShardServers(shardId erasure_coding.Sh
 
 	for _, sourceDataNode := range sourceDataNodes {
 		glog.V(4).Infof("delete from remote ec shard %d.%d from %s", ecVolume.VolumeId, shardId, sourceDataNode)
-		err := s.doDeleteNeedleFromRemoteEcShard(sourceDataNode, ecVolume.VolumeId, ecVolume.Collection, ecVolume.Version, needleId)
-		if err != nil {
+		if err := s.doDeleteNeedleFromRemoteEcShard(sourceDataNode, ecVolume.VolumeId, ecVolume.Collection, ecVolume.Version, needleId); err != nil {
 			return err
 		}
-		glog.V(1).Infof("delete from remote ec shard %d.%d from %s: %v", ecVolume.VolumeId, shardId, sourceDataNode, err)
 	}
 
 	return nil