refactor: move SignatureFlow enum to dedicated Enum directory

Move SignatureFlow from lib/Service/ to lib/Enum/ to centralize all
enum definitions in the same location following project structure
conventions.

Updated namespace from OCA\Libresign\Service to OCA\Libresign\Enum
and adjusted all imports and references across:
- AdminController (updated FQN references for from() and comparison)
- PageController (updated FQN reference)
- TemplateLoader (updated FQN reference)
- Settings/Admin (updated import statement)
- SequentialSigningService (added explicit import)

This completes the consolidation of enum types, making the codebase
more organized and easier to maintain.

Signed-off-by: Vitor Mattos <[email protected]>

Author: vitormattos

lib/Controller/AdminController.php

@@ -908,15 +908,15 @@ public function footerTemplatePreviewPdf(string $template = '', int $width = 595
 	#[ApiRoute(verb: 'POST', url: '/api/{apiVersion}/admin/signature-flow/config', requirements: ['apiVersion' => '(v1)'])]
 	public function setSignatureFlowConfig(string $mode): DataResponse {
 		try {
-			$signatureFlow = \OCA\Libresign\Service\SignatureFlow::from($mode);
+			$signatureFlow = \OCA\Libresign\Enum\SignatureFlow::from($mode);
 		} catch (\ValueError) {
 			return new DataResponse([
 				'error' => $this->l10n->t('Invalid signature flow mode. Use "parallel" or "ordered_numeric".'),
 			], Http::STATUS_BAD_REQUEST);
 		}
 
 		try {
-			if ($signatureFlow === \OCA\Libresign\Service\SignatureFlow::PARALLEL) {
+			if ($signatureFlow === \OCA\Libresign\Enum\SignatureFlow::PARALLEL) {
 				$this->appConfig->deleteKey(Application::APP_ID, 'signature_flow');
 			} else {
 				$this->appConfig->setValueString(

lib/Controller/PageController.php

@@ -95,7 +95,7 @@ public function index(): TemplateResponse {
 
 		$this->provideSignerSignatues();
 		$this->initialState->provideInitialState('identify_methods', $this->identifyMethodService->getIdentifyMethodsSettings());
-		$this->initialState->provideInitialState('signature_flow', $this->appConfig->getValueString(Application::APP_ID, 'signature_flow', \OCA\Libresign\Service\SignatureFlow::PARALLEL->value));
+		$this->initialState->provideInitialState('signature_flow', $this->appConfig->getValueString(Application::APP_ID, 'signature_flow', \OCA\Libresign\Enum\SignatureFlow::PARALLEL->value));
 		$this->initialState->provideInitialState('legal_information', $this->appConfig->getValueString(Application::APP_ID, 'legal_information'));
 
 		Util::addScript(Application::APP_ID, 'libresign-main');

lib/Service/SignatureFlow.php lib/Enum/SignatureFlow.phplib/Service/SignatureFlow.php renamed to lib/Enum/SignatureFlow.php

@@ -1,12 +1,13 @@
 <?php
 
 declare(strict_types=1);
+
 /**
  * SPDX-FileCopyrightText: 2025 LibreCode coop and contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
  */
 
-namespace OCA\Libresign\Service;
+namespace OCA\Libresign\Enum;
 
 /**
  * Signature flow modes

lib/Files/TemplateLoader.php

@@ -59,7 +59,7 @@ public function handle(Event $event): void {
 
 		$this->initialState->provideInitialState(
 			'signature_flow',
-			$this->appConfig->getValueString(Application::APP_ID, 'signature_flow', \OCA\Libresign\Service\SignatureFlow::PARALLEL->value)
+			$this->appConfig->getValueString(Application::APP_ID, 'signature_flow', \OCA\Libresign\Enum\SignatureFlow::PARALLEL->value)
 		);
 
 		try {

lib/Settings/Admin.php

@@ -9,14 +9,14 @@
 namespace OCA\Libresign\Settings;
 
 use OCA\Libresign\AppInfo\Application;
+use OCA\Libresign\Enum\SignatureFlow;
 use OCA\Libresign\Exception\LibresignException;
 use OCA\Libresign\Handler\CertificateEngine\CertificateEngineFactory;
 use OCA\Libresign\Service\CertificatePolicyService;
 use OCA\Libresign\Service\DocMdpConfigService;
 use OCA\Libresign\Service\FooterService;
 use OCA\Libresign\Service\IdentifyMethodService;
 use OCA\Libresign\Service\SignatureBackgroundService;
-use OCA\Libresign\Service\SignatureFlow;
 use OCA\Libresign\Service\SignatureTextService;
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\AppFramework\Services\IInitialState;