Fix: Rename app folder to match app ID

- Renamed analytics-hub/ → analyticshub/
- App ID in info.xml is 'analyticshub' (no hyphen)
- Nextcloud requires folder name to match app ID exactly
- Fixes 'Could not download app analyticshub' error during installation

Installation:
- Upload analyticshub/ folder to /var/www/nextcloud/apps/
- Folder name must match app ID in info.xml

analyticshub/lib/Service/Exceptions.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\AnalyticsHub\Service;
+
+/**
+ * Custom exceptions for Analytics Hub
+ */
+
+/**
+ * Token expired exception
+ */
+class TokenExpiredException extends \Exception {
+    public function __construct(string $message = "Refresh token expired") {
+        parent::__construct($message);
+    }
+}
+
+/**
+ * Rate limit exceeded exception
+ */
+class RateLimitException extends \Exception {
+    public function __construct(string $message = "Rate limit exceeded") {
+        parent::__construct($message);
+    }
+}
+
+/**
+ * Timeout exception
+ */
+class TimeoutException extends \Exception {
+    public function __construct(string $message = "API timeout") {
+        parent::__construct($message);
+    }
+}
+
+/**
+ * Data incomplete exception
+ */
+class DataIncompleteException extends \Exception {
+    public function __construct(string $message = "Data incomplete") {
+        parent::__construct($message);
+    }
+}