Merge branch '6.4' into 7.0

* 6.4:
  [Logger] Using LogLevel `const`s
  [Messenger] Mention `ScheduledStamp`

Author: javiereguiluz

components/messenger.rst

@@ -162,6 +162,15 @@ Here are some important envelope stamps that are shipped with the Symfony Messen
   to configure the validation groups used when the validation middleware is enabled.
 * :class:`Symfony\\Component\\Messenger\\Stamp\\ErrorDetailsStamp`,
   an internal stamp when a message fails due to an exception in the handler.
+* :class:`Symfony\\Component\\Messenger\\Stamp\\ScheduledStamp`,
+  a stamp that marks the message as produced by a scheduler. This helps
+  differentiate it from messages created "manually". You can learn more about it
+  in the :doc:`Scheduler documentation </scheduler>`.
+
+.. versionadded:: 6.4
+
+    The :class:`Symfony\\Component\\Messenger\\Stamp\\ScheduledStamp` was
+    introduced in Symfony 6.4.
 
 .. note::
 

logging.rst

@@ -155,6 +155,7 @@ to write logs using the :phpfunction:`syslog` function:
     .. code-block:: php
 
         // config/packages/prod/monolog.php
+        use Psr\Log\LogLevel;
         use Symfony\Config\MonologConfig;
 
         return static function (MonologConfig $monolog): void {
@@ -164,12 +165,12 @@ to write logs using the :phpfunction:`syslog` function:
                 // log to var/logs/(environment).log
                 ->path('%kernel.logs_dir%/%kernel.environment%.log')
                 // log *all* messages (debug is lowest level)
-                ->level('debug');
+                ->level(LogLevel::DEBUG);
 
             $monolog->handler('syslog_handler')
                 ->type('syslog')
                 // log error-level messages and higher
-                ->level('error');
+                ->level(LogLevel::ERROR);
         };
 
 This defines a *stack* of handlers and each handler is called in the order that it's

scheduler.rst

@@ -881,6 +881,15 @@ before being further redispatched to its corresponding handler::
         }
     }
 
+When using the ``RedispatchMessage``, Symfony will attach a
+:class:`Symfony\\Component\\Messenger\\Stamp\\ScheduledStamp` to the message,
+helping you identify those messages when needed.
+
+.. versionadded:: 6.4
+
+    Automatically attaching a :class:`Symfony\\Component\\Messenger\\Stamp\\ScheduledStamp`
+    to redispatched messages was introduced in Symfony 6.4.
+
 .. _`Memoizing`: https://en.wikipedia.org/wiki/Memoization
 .. _`cron command-line utility`: https://en.wikipedia.org/wiki/Cron
 .. _`crontab.guru website`: https://crontab.guru/