- Added detailed explanations and examples for cursor semantics in `api-types.md`, clarifying the exclusive nature of cursors in pagination.
- Updated `CursorPaginationParams` interface to emphasize the cursor's role as an exclusive boundary in responses.
- Refactored `BranchMessagesQueryParams` to extend `CursorPaginationParams`, aligning with the new pagination logic.
- Modified `MessageService` to implement cursor-based pagination semantics, ensuring accurate message retrieval and response structure.
- Enhanced documentation throughout to provide clearer guidance on pagination behavior and usage patterns.
- Updated CreateMessageDto to include detailed behavior for the parentId field, allowing for auto-resolution based on topic state, explicit root creation, or attachment to a specified parent message.
- Refactored MessageService to implement the new parentId logic, ensuring proper validation and error handling for message creation based on the topic's current state and existing messages.
- Enhanced transaction safety and clarity in the message insertion process by resolving parentId before inserting new messages.
- Added optional fields `traceId` and `stats` to the `UpdateMessageDto` interface for enhanced message tracking and statistics.
- Updated `MessageService` to handle the new fields during message updates, ensuring they are correctly processed in the database.
- Introduced `ActiveNodeStrategy` type to define strategies for updating `activeNodeId` when a message is deleted.
- Updated `DeleteMessageResponse` to include `newActiveNodeId` for tracking changes to the active node after deletion.
- Modified the `DELETE` endpoint to accept `activeNodeStrategy` as a query parameter, allowing for flexible handling of active node updates.
- Enhanced the `delete` method in `MessageService` to implement the new strategies, ensuring consistent behavior during message deletions.
- Added `setAsActive` property to `CreateMessageDto` for controlling active node status in topics.
- Updated `messageTable` and `topicTable` schemas to include foreign key constraints and improved handling of active node references.
- Refactored message and topic service methods to utilize `.returning()` for better data retrieval after inserts and updates.
- Implemented hard delete functionality for messages and topics, replacing soft delete logic to ensure data integrity.
- Updated MessageStatus type to include 'pending' as a new state, reflecting the message processing lifecycle.
- Modified CreateMessageDto and UpdateMessageDto interfaces to utilize the updated MessageStatus type for improved clarity and consistency in message status management.
