Ignore erroneous PHPStan error in SentryHelper

src/library/FOSSBilling/SentryHelper.php

@@ -112,6 +112,9 @@ public function sendRequest(Request $request, Options $options): Response
         /**
          * Here we validate that the DSN is correctly set and that error reporting is enabled before passing it off to the Sentry SDK.
          * It may look a bit odd, but the DSN placeholder value here is split into two strings and concatenated so we can easily perform a `sed` replacement of the placeholder without it effecting this check
+         *
+         * Ignore PHPStan $sentryDSN empty() never defined error - the value is replaced during release and the check is written with this in mind.
+         * @phpstan-ignore-next-line
          */
         if ($config['debug_and_monitoring']['report_errors'] && $sentryDSN !== '--replace--this--' . 'during--release--process--' && !empty($sentryDSN)) {
             // Per Sentry documentation, not setting this results in the SDK simply not sending any information.