chore: reduce code complexity

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

lib/Helper/ValidateHelper.php

@@ -546,16 +546,22 @@ private function normalizeIdentifyMethods(array $signer): array {
 		$normalizedMethods = [];
 
 		foreach ($signer[$key] as $name => $data) {
-			if ($key === 'identifyMethods') {
-				$normalizedMethods[] = $this->normalizeIdentifyMethodsStructure($data);
-			} else {
-				$normalizedMethods[] = $this->normalizeIdentifyStructure($name, $data);
-			}
+			$normalizedMethods[] = $this->normalizeIdentifyMethodEntry($key, $name, $data);
 		}
-
 		return $normalizedMethods;
 	}
 
+	/**
+	 * Extracted from normalizeIdentifyMethods to reduce cyclomatic complexity.
+	 */
+	private function normalizeIdentifyMethodEntry(string $key, $name, $data): array {
+		if ($key === 'identifyMethods') {
+			return $this->normalizeIdentifyMethodsStructure($data);
+		} else {
+			return $this->normalizeIdentifyStructure($name, $data);
+		}
+	}
+
 	private function normalizeIdentifyMethodsStructure(mixed $data): array {
 		if (!is_array($data) || !array_key_exists('method', $data) || !array_key_exists('value', $data)) {
 			throw new LibresignException('Invalid identify method structure');