feat(cms,asset): add comprehensive test suite and finalize modules

- Add comprehensive test suite for CMS and Asset modules using Pest Framework
- Implement ContentTypeService::delete() protection against deletion of in-use content types
- Add CannotDeleteContentTypeInUseException for better error handling
- Fix DerivatPipelineRegistry::getAllPipelines() to handle object uniqueness correctly
- Fix VariantName::getScale() to correctly parse scales with file extensions
- Update CMS module documentation with new features, exceptions, and test coverage
- Add CmsTestHelpers and AssetTestHelpers for test data factories
- Fix BlockTypeRegistry to be immutable after construction
- Update ContentTypeService to check for associated content before deletion
- Improve BlockRendererRegistry initialization

Test coverage:
- Value Objects: All CMS and Asset value objects
- Services: ContentService, ContentTypeService, SlugGenerator, BlockValidator, ContentLocalizationService, AssetService, DeduplicationService, MetadataExtractor
- Repositories: All database repositories with mocked connections
- Rendering: Block renderers and ContentRenderer
- Controllers: API endpoints for both modules

254 tests passing, 38 remaining (mostly image processing pipeline tests)

tests/Support/CmsTestHelpers.php

@@ -0,0 +1,127 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Tests\Support;
+
+use App\Domain\Cms\Entities\Content;
+use App\Domain\Cms\Entities\ContentType;
+use App\Domain\Cms\Enums\ContentStatus;
+use App\Domain\Cms\ValueObjects\BlockData;
+use App\Domain\Cms\ValueObjects\BlockId;
+use App\Domain\Cms\ValueObjects\BlockType;
+use App\Domain\Cms\ValueObjects\ContentBlock;
+use App\Domain\Cms\ValueObjects\ContentBlocks;
+use App\Domain\Cms\ValueObjects\ContentId;
+use App\Domain\Cms\ValueObjects\ContentSlug;
+use App\Domain\Cms\ValueObjects\ContentTypeId;
+use App\Domain\Cms\ValueObjects\Locale;
+use App\Framework\Core\ValueObjects\Timestamp;
+use App\Framework\DateTime\Clock;
+
+final class CmsTestHelpers
+{
+    public static function createContent(
+        Clock $clock,
+        ?ContentId $id = null,
+        ?ContentTypeId $contentTypeId = null,
+        ?ContentSlug $slug = null,
+        ?string $title = null,
+        ?ContentBlocks $blocks = null,
+        ?ContentStatus $status = null,
+        ?Locale $defaultLocale = null
+    ): Content {
+        return new Content(
+            id: $id ?? ContentId::generate($clock),
+            contentTypeId: $contentTypeId ?? ContentTypeId::fromString('page'),
+            slug: $slug ?? ContentSlug::fromString('test-page'),
+            title: $title ?? 'Test Page',
+            blocks: $blocks ?? self::createSimpleBlocks(),
+            status: $status ?? ContentStatus::DRAFT,
+            authorId: null,
+            publishedAt: null,
+            metaData: null,
+            defaultLocale: $defaultLocale ?? Locale::english(),
+            createdAt: Timestamp::now(),
+            updatedAt: Timestamp::now()
+        );
+    }
+
+    public static function createContentType(
+        ?ContentTypeId $id = null,
+        ?string $name = null,
+        ?string $slug = null,
+        bool $isSystem = false
+    ): ContentType {
+        return new ContentType(
+            id: $id ?? ContentTypeId::fromString('page'),
+            name: $name ?? 'Page',
+            slug: $slug ?? 'page',
+            description: 'A test page content type',
+            isSystem: $isSystem,
+            createdAt: Timestamp::now(),
+            updatedAt: Timestamp::now()
+        );
+    }
+
+    public static function createSimpleBlocks(): ContentBlocks
+    {
+        return ContentBlocks::fromArray([
+            [
+                'id' => 'hero-1',
+                'type' => 'hero',
+                'data' => ['title' => 'Hero Title'],
+            ],
+        ]);
+    }
+
+    public static function createHeroBlock(
+        ?BlockId $blockId = null,
+        ?string $title = null
+    ): ContentBlock {
+        return ContentBlock::create(
+            type: BlockType::hero(),
+            blockId: $blockId ?? BlockId::fromString('hero-1'),
+            data: BlockData::fromArray(['title' => $title ?? 'Hero Title'])
+        );
+    }
+
+    public static function createTextBlock(
+        ?BlockId $blockId = null,
+        ?string $content = null
+    ): ContentBlock {
+        return ContentBlock::create(
+            type: BlockType::text(),
+            blockId: $blockId ?? BlockId::fromString('text-1'),
+            data: BlockData::fromArray(['content' => $content ?? 'Text content'])
+        );
+    }
+
+    public static function createImageBlock(
+        ?BlockId $blockId = null,
+        ?string $imageId = null
+    ): ContentBlock {
+        return ContentBlock::create(
+            type: BlockType::image(),
+            blockId: $blockId ?? BlockId::fromString('image-1'),
+            data: BlockData::fromArray(['imageId' => $imageId ?? 'img-123'])
+        );
+    }
+
+    public static function createContentTranslation(
+        ContentId $contentId,
+        ?Locale $locale = null,
+        ?string $title = null,
+        ?ContentBlocks $blocks = null
+    ): \App\Domain\Cms\Entities\ContentTranslation {
+        return new \App\Domain\Cms\Entities\ContentTranslation(
+            contentId: $contentId,
+            locale: $locale ?? Locale::german(),
+            title: $title ?? 'Deutscher Titel',
+            blocks: $blocks ?? self::createSimpleBlocks(),
+            createdAt: Timestamp::now(),
+            updatedAt: Timestamp::now()
+        );
+    }
+}
+