Add manage_updates permission schema migration

- Bump permission schema to version 4
- Add upgradeSchemaToVersion4 for manage_updates permission
  - Grants manage_updates to users who have both show_updates and server_infos
- Fix ZIP_RELEASE installation type: set supportsAutoUpdate to false
  (ZIP update not yet implemented)
- Improve update instructions for ZIP installations

src/Services/System/InstallationTypeDetector.php

@@ -51,7 +51,8 @@ enum InstallationType: string
         return match($this) {
             self::GIT => true,
             self::DOCKER => false,
-            self::ZIP_RELEASE => true,
+            // ZIP_RELEASE auto-update not yet implemented
+            self::ZIP_RELEASE => false,
             self::UNKNOWN => false,
         };
     }
@@ -61,7 +62,7 @@ enum InstallationType: string
         return match($this) {
             self::GIT => 'Run: php bin/console partdb:update',
             self::DOCKER => 'Pull the new Docker image and recreate the container: docker-compose pull && docker-compose up -d',
-            self::ZIP_RELEASE => 'Download the new release, extract it, and run migrations.',
+            self::ZIP_RELEASE => 'Download the new release ZIP from GitHub, extract it over your installation, and run: php bin/console doctrine:migrations:migrate && php bin/console cache:clear',
             self::UNKNOWN => 'Unable to determine installation type. Please update manually.',
         };
     }