Fix - Avoid SQL warning when no user session is active during plugin init

[RomainLvr]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !43370
• Here is a brief description of what this PR does

When initializing the plugin during boot (before any user session), getEntitiesRestrictCriteria() was called without an active session, producing entities_id = '' in the SQL query and triggering a mass MySQL warning (1292: Truncated incorrect DECIMAL value).

Fix by skipping entity restriction when no user is logged in (!Session::getLoginUserID()), consistent with the existing check already in place in setup.php.

Error :

SQL: SELECT * FROM `glpi_plugin_fields_containers` WHERE `is_active` = '1' AND `type` = 'dom' AND ((`itemtypes` LIKE '%\\\"Ticket\\\"%') OR (`itemtypes` LIKE '%\\\"Change\\\"%') OR (`itemtypes` LIKE '%\\\"Problem\\\"%')) AND (`glpi_plugin_fields_containers`.`entities_id` = '') ORDER BY `name`
  Warnings: 
1292: Truncated incorrect DECIMAL value: '' at DBmysql.php line 444
  Backtrace :
  ./src/DBmysql.php:444                              
  ./src/DBmysqlIterator.php:129                      DBmysql->doQuery()
  ./src/DBmysql.php:1088                             DBmysqlIterator->execute()
  ./src/CommonDBTM.php:632                           DBmysql->request()
  ./plugins/fields/inc/questiontype.class.php:384    CommonDBTM->find()
  ./plugins/fields/inc/questiontype.class.php:426    PluginFieldsQuestionType->getAvailableBlocks()
  ./plugins/fields/setup.php:428                     PluginFieldsQuestionType::hasAvailableFields()
  ./plugins/fields/setup.php:136                     plugin_fields_register_plugin_types()
  ./src/Plugin.php:475                               plugin_init_fields()
  ./src/Plugin.php:428                               Plugin::load()
  ...tener/PostBootListener/InitializePlugins.php:75 Plugin->init()
  .../event-dispatcher/Debug/WrappedListener.php:116 Glpi\Kernel\Listener\PostBootListener\InitializePlugins->onPostBoot()
  ...ymfony/event-dispatcher/EventDispatcher.php:220 Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke()
  ...symfony/event-dispatcher/EventDispatcher.php:56 Symfony\Component\EventDispatcher\EventDispatcher->callListeners()
  ...spatcher/Debug/TraceableEventDispatcher.php:142 Symfony\Component\EventDispatcher\EventDispatcher->dispatch()
  ./src/Glpi/Kernel/Kernel.php:149                   Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch()
  ./vendor/symfony/http-kernel/Kernel.php:201        Glpi\Kernel\Kernel->boot()
  ./public/index.php:71                              Symfony\Component\HttpKernel\Kernel->handle()

Close #1172