Merge pull request onflow#5661 from onflow/leo/fix-traversal-error-ha…

…ndling

Fix unsafeTraverse error handling

state/fork/traversal.go

@@ -107,9 +107,11 @@ func unsafeTraverse(headers storage.Headers, block *flow.Header, visitor onVisit
 			return block, nil
 		}
 
-		block, err = headers.ByBlockID(block.ParentID)
+		parent, err := headers.ByBlockID(block.ParentID)
 		if err != nil {
-			return nil, fmt.Errorf("failed to revtrieve block header %x: %w", block.ParentID, err)
+			return nil, fmt.Errorf("failed to retrieve block header (id=%x height=%d): %w", block.ParentID, block.Height-1, err)
 		}
+
+		block = parent
 	}
 }