docs: Entscheidungsnotiz nennt PHP-8.4-Grenze der Signatur-Referenz, die Fähigkeiten von lit-content-create, Freigabe-Ruling auch für TESTED und belegt den permission_callback im mcp-adapter; Bootable-Docblock

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/Integrations/Bootable.php

@@ -13,6 +13,9 @@ defined('ABSPATH') || exit;
  */
 interface Bootable
 {
-    /** Registers the integration's own hooks, routes, CLI commands and admin tabs. Called once by Plugin. */
+    /**
+     * Registers the integration's own hooks, routes, CLI commands and admin tabs. IntegrationRegistry::boot() calls it
+     * at most once per request.
+     */
     public function boot(): void;
 }