## Vector Stores
### Resolved Issues
- Fixed: Creating a Vector Store when sending a message may fail because
of lazy loading changes introduced in #1050.

## Threads
### New Features
- Adds new admin-only endpoint
`/class/{class_id}/thread/{thread_id}/details` that returns:
    - The `Thread` object with a large number of relationships loaded
- A `conversation_items` array that displays messages, tool calls, and
reasoning steps in ascending `output_index` order.