Major refactor: split AcToonSerializer.MetaSection.cs into focused modules for meta writing, type/enum definitions, navigation, foreign key, validation, descriptions, placeholders, topological sort, and attribute detection. Extend ToonDescriptionAttribute with BusinessRule, TypeRelation, and RelatedTypes for richer metadata. Add ToonTypeRelation constants. Annotate all DTOs with ToonDescription for type relationships. Refactor TypeMetadataBase for customizable ignore filters. Update tests and settings. Improves maintainability, extensibility, and metadata accuracy.
- Introduce AcNavigationPropertyInfo for unified, cached relationship metadata per property (primary key, navigation type, FK, other key, inverse, target type)
- Refactor relationship detection to use AcNavigationPropertyInfo, replacing ad-hoc logic and old RelationshipMetadata
- Add AcSerializerCommon.GetCSharpTypeName for consistent, C#-style type name formatting (handles primitives, generics, nullables, enums, collections)
- Use topological sort for @types output to ensure dependency order
- Improve enum handling: avoid redundant constraints, use new type name formatter for underlying types
- Output navigation, foreign-key, other-key, and inverse-property metadata consistently in meta section
- Enhance convention-based detection for inverse properties and "other key", including unidirectional/polymorphic support
- Add comprehensive test for navigation metadata completeness and demo test entities
- Add "source-code-language: C#" to meta section
- Misc: code cleanup, remove unused cache, improve property filtering
- Refined type metadata serialization: collections and dictionaries are now detected and described more accurately, avoiding generic type names (e.g., List`1) and redundant "object" element types.
- Added circular reference protection to type name generation to prevent stack overflows and duplicate type names.
- Updated AcToonSerializerOptions.Compact to use indentation for better readability.
- Introduced ToonTests with unit tests to ensure type metadata correctness, uniqueness, and clarity.
- Added AyCode.Core project to the solution and adjusted namespaces/usings for consistency.
Loretta