Guard null controller access in EverblockTools shortcode rendering

[CySSoO]

Motivation

• Prevent a PHP warning when $context->controller is null by avoiding direct access to controller_type in EverblockTools::renderShortcodes().

Description

• Safely resolve the controller type into $controllerType using is_object($context->controller) and isset($context->controller->controller_type), or assign null otherwise.
• Only run getCustomerShortcodes() and obfuscateTextByClass() when $controllerType is non-null and in_array($controllerType, $controllerTypes, true), preserving previous behavior for front/modulefront controllers.
• Change implemented in src/Service/EverblockTools.php.

Testing

• Ran php -l src/Service/EverblockTools.php and it reported No syntax errors detected.

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Codex Task