fix(http): drop deprecated curl_close calls; resolve Proxy destination lazily

PHP 8.5 deprecates curl_close() (no-op since 8.0) and Libs\Proxy fataled
on class load because SOURCE_URL was evaluated in a static property
initializer. Stamps http with per-component core data for load-verified
clients (aria2, proxy, compreFace).

packages/http/src/Libs/Proxy.php

@@ -22,9 +22,25 @@ class Proxy
         'Location',
     ];
     public static $proxy_base_url_canonical = '/';
-    public static $destination_host = SOURCE_URL;
+    public static ?string $destination_host = null;
     protected static $filters = [];
 
+    /**
+     * Host destino efectivo: el asignado explicitamente o la constante
+     * SOURCE_URL del proyecto si existe. Se resuelve tarde para que la
+     * simple carga de la clase no falle sin configuracion.
+     *
+     * @return string
+     */
+    protected static function destinationHost(): string
+    {
+        if (static::$destination_host !== null) {
+            return static::$destination_host;
+        }
+
+        return defined('SOURCE_URL') ? (string) SOURCE_URL : '';
+    }
+
     /**
      * Adds a callable (AKA filter) that will receive the content
      * and should return a string.
@@ -76,7 +92,7 @@ class Proxy
         }
 
         // Generate the final URL
-        $proxy_request_url = static::$destination_host . $proxy_request_uri;
+        $proxy_request_url = static::destinationHost() . $proxy_request_uri;
 
         // cURL initialization
         $ch = curl_init();
@@ -121,11 +137,10 @@ class Proxy
 
         // Execute the request
         $res = curl_exec($ch);
-        curl_close($ch);
 
         // Parse the response
         list($headers, $body) = explode("\r\n\r\n", $res, 2);
-        $headers = str_replace(static::$destination_host, '/', $headers);
+        $headers = str_replace(static::destinationHost(), '/', $headers);
 
         $headers = explode("\r\n", $headers);
         $hs = [];