feat: module architecture improvements — session keys, dependency graph, event dispatcher, deactivation hooks

Six targeted improvements to the modular monolith platform:

1. Fix AddressBook session key prefix to follow module.<id>.* convention
2. Move ADDRESS_BOOK_VIEW permission constant from core PermissionService into module
3. Add declarative JSON schema for module manifests (.agents/contracts/)
4. Add `requires` field with missing-dependency and circular-dependency detection
5. Add lightweight fire-and-forget event dispatcher (user.created/deleted/login/logout)
6. Add module deactivation hook interface and CLI script (bin/module-deactivate.php)

Includes 15 new architecture/unit tests covering all new functionality.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/Service/Auth/AuthServicesFactory.php

@@ -3,6 +3,7 @@
 namespace MintyPHP\Service\Auth;
 
 use MintyPHP\App\AppContainer;
+use MintyPHP\App\Module\ModuleEventDispatcher;
 use MintyPHP\Http\CookieStoreInterface;
 use MintyPHP\Http\RequestRuntimeInterface;
 use MintyPHP\Http\SessionStoreInterface;
@@ -100,7 +101,8 @@ class AuthServicesFactory
             $this->createTenantSsoService(),
             $this->createAuthSessionTenantContextService(),
             $this->auditServicesFactory->createSystemAuditService(),
-            $this->sessionStore
+            $this->sessionStore,
+            $this->resolveEventDispatcher()
         );
     }
 
@@ -148,6 +150,15 @@ class AuthServicesFactory
         return new OidcHttpGateway();
     }
 
+    private function resolveEventDispatcher(): ?ModuleEventDispatcher
+    {
+        if ($this->appContainer->has(ModuleEventDispatcher::class)) {
+            $dispatcher = $this->appContainer->get(ModuleEventDispatcher::class);
+            return $dispatcher instanceof ModuleEventDispatcher ? $dispatcher : null;
+        }
+        return null;
+    }
+
     private function createAuthSessionTenantContextService(): AuthSessionTenantContextService
     {
         return $this->authSessionTenantContextService ??= new AuthSessionTenantContextService(