[AiBundle] Replace symfony_ai tag prefix with ai. prefix

Change lmstudio platform service ID and tag from 'symfony_ai' to 'ai.' to align with consistent naming convention used throughout the bundle.

Author: OskarStark

src/ai-bundle/src/AiBundle.php

@@ -383,7 +383,7 @@ private function processPlatformConfig(string $type, array $platform, ContainerB
         }
 
         if ('lmstudio' === $type) {
-            $platformId = 'symfony_ai.platform.lmstudio';
+            $platformId = 'ai.platform.lmstudio';
             $definition = (new Definition(Platform::class))
                 ->setFactory(LmStudioPlatformFactory::class.'::create')
                 ->setLazy(true)
@@ -393,7 +393,7 @@ private function processPlatformConfig(string $type, array $platform, ContainerB
                     new Reference('http_client', ContainerInterface::NULL_ON_INVALID_REFERENCE),
                     new Reference('ai.platform.contract.default'),
                 ])
-                ->addTag('symfony_ai.platform');
+                ->addTag('ai.platform');
 
             $container->setDefinition($platformId, $definition);