fix(metrics): robust contact detection with AstDB fallback and reset f2b counters on clear log (v1.4.7)

public/api.php

@@ -140,7 +140,7 @@ try {
             $installedVerData = file_exists("{$appDir}/version.json")
                 ? json_decode((string)file_get_contents("{$appDir}/version.json"), true)
                 : [];
-            $installedVer = $installedVerData['version'] ?? '1.4.6';
+            $installedVer = $installedVerData['version'] ?? '1.4.7';
 
             echo json_encode([
                 'success'          => true,
@@ -227,7 +227,7 @@ try {
                 @chmod($webLog, 0664);
             }
             @unlink('/tmp/nexus_fw_status_cache.json');
-            exec('sudo /usr/bin/fail2ban-client reload 2>&1');
+            exec('sudo /usr/bin/systemctl restart fail2ban 2>&1 || sudo /usr/bin/fail2ban-client reload 2>&1');
 
             echo json_encode([
                 'success' => true,