## Description Document the Core layer services and domain models so contributors can understand the business logic. ## Tasks - [ ] Add XML documentation comments to all public Core interfaces - [ ] Document the accounting engine's transaction posting flow - [ ] Create architecture decision records (ADRs) in \`docs/\` - [ ] Add a developer guide explaining the Clean Architecture layers - [ ] Document the database schema and entity relationships
Description
Document the Core layer services and domain models so contributors can understand the business logic.
Tasks