Add Record/Level/LevelName type aliases and improve phpstan type coverage to level 6

src/Monolog/Handler/AbstractSyslogHandler.php

@@ -17,13 +17,18 @@ use Monolog\Formatter\LineFormatter;
 
 /**
  * Common syslog functionality
+ *
+ * @phpstan-import-type Level from \Monolog\Logger
  */
 abstract class AbstractSyslogHandler extends AbstractProcessingHandler
 {
+    /** @var int */
     protected $facility;
 
     /**
      * Translates Monolog log levels to syslog log priorities.
+     * @var array
+     * @phpstan-var array<Level, int>
      */
     protected $logLevels = [
         Logger::DEBUG     => LOG_DEBUG,
@@ -38,6 +43,7 @@ abstract class AbstractSyslogHandler extends AbstractProcessingHandler
 
     /**
      * List of valid log facility names.
+     * @var array<string, int>
      */
     protected $facilities = [
         'auth'     => LOG_AUTH,