feat: Integrate DataForSEO for indexed pages tracking

- Updated CRON documentation to include DataForSEO metrics synchronization.
- Enhanced SettingsController to manage DataForSEO API credentials and settings.
- Modified SiteController to handle DataForSEO domain input.
- Updated Site model to accommodate DataForSEO data handling.
- Added methods in SiteSeoMetric model for DataForSEO data retrieval and validation.
- Implemented SiteSeoSyncService to synchronize SEO metrics from both SEMSTORM and DataForSEO.
- Enhanced dashboard templates to display indexed pages data.
- Updated settings and site creation/edit templates to include DataForSEO fields.
- Created migration for adding DataForSEO related columns in the database.
- Developed DataForSeoService to fetch indexed pages count from DataForSEO API.

templates/dashboard/seo-stats.php

@@ -52,6 +52,7 @@
                     <th class="text-nowrap"><a class="link-dark text-decoration-none" href="<?= htmlspecialchars($sortLink('top20')) ?>">TOP20<?= htmlspecialchars($sortMark('top20')) ?></a></th>
                     <th class="text-nowrap"><a class="link-dark text-decoration-none" href="<?= htmlspecialchars($sortLink('top50')) ?>">TOP50<?= htmlspecialchars($sortMark('top50')) ?></a></th>
                     <th class="text-nowrap"><a class="link-dark text-decoration-none" href="<?= htmlspecialchars($sortLink('traffic')) ?>">Ruch<?= htmlspecialchars($sortMark('traffic')) ?></a></th>
+                    <th class="text-nowrap"><a class="link-dark text-decoration-none" href="<?= htmlspecialchars($sortLink('indexed_pages')) ?>">Zaindeksowane<?= htmlspecialchars($sortMark('indexed_pages')) ?></a></th>
                     <th>Aktualizacja</th>
                     <th></th>
                 </tr>
@@ -59,7 +60,7 @@
             <tbody>
                 <?php if (empty($rows)): ?>
                     <tr>
-                        <td colspan="10" class="text-center text-muted py-4">Brak danych SEO.</td>
+                        <td colspan="11" class="text-center text-muted py-4">Brak danych SEO.</td>
                     </tr>
                 <?php else: ?>
                     <?php foreach ($rows as $row): ?>
@@ -128,6 +129,14 @@
                                     -
                                 <?php endif; ?>
                             </td>
+                            <td class="text-nowrap">
+                                <?php if (!empty($row['metric_month'])): ?>
+                                    <?= (int) ($row['indexed_pages'] ?? 0) ?>
+                                    <small><?= $formatDelta($row['indexed_pages'] ?? 0, $row['prev_indexed_pages'] ?? null) ?></small>
+                                <?php else: ?>
+                                    -
+                                <?php endif; ?>
+                            </td>
                             <td class="text-nowrap">
                                 <?php if (!empty($row['updated_at'])): ?>
                                     <?= htmlspecialchars(date('d.m.Y H:i', strtotime((string) $row['updated_at']))) ?>