Release validation source bytes after checks

internal/validation/local_replacements.go

@@ -69,11 +69,11 @@ func readModuleDeclaration(ctx context.Context, tree *CandidateTree, entry git.T
 		return contents, nil
 	}
 
-	target, err := tree.ReadFile(ctx, entry.Path)
+	target, err := tree.readSymlinkTarget(ctx, entry)
 	if err != nil {
 		return nil, fmt.Errorf("read symlink declaration: %w", err)
 	}
-	destination, err := tree.ResolveDestination(ctx, entry.Path, string(target))
+	destination, err := tree.ResolveDestination(ctx, entry.Path, target)
 	if err != nil {
 		return nil, fmt.Errorf("resolve symlink declaration target %q: %w", target, err)
 	}