fix(cluster): auto-ensure blf_expiry and peer_port columns exist in ClusterManager constructor

src/ClusterManager.php

@@ -21,6 +21,20 @@ class ClusterManager
     public function __construct(?PDO $db = null)
     {
         $this->db = $db ?? Database::getConnection();
+        $this->ensureColumns();
+    }
+
+    private function ensureColumns(): void
+    {
+        try {
+            $cols = $this->db->query("PRAGMA table_info(cluster_settings)")->fetchAll(PDO::FETCH_COLUMN, 1);
+            if (!in_array('blf_expiry', $cols, true)) {
+                $this->db->exec("ALTER TABLE cluster_settings ADD COLUMN blf_expiry INTEGER NOT NULL DEFAULT 120");
+            }
+            if (!in_array('peer_port', $cols, true)) {
+                $this->db->exec("ALTER TABLE cluster_settings ADD COLUMN peer_port INTEGER NOT NULL DEFAULT 8443");
+            }
+        } catch (\Throwable $e) {}
     }
 
     /**