Diana: Week 2 Update

This week focused on the session and messaging layer of Diana’s backend.

Built out full session management — creating chat sessions, listing them, and retrieving conversation history — along with the core chat endpoint that stores both user and assistant messages.

Every endpoint is now scoped to the authenticated user, ensuring one user’s data can never be accessed by another.

With this in place, the foundation is ready for Week 3: standing up the FastAPI AI service and connecting it to the backend.

Progress: Backend Foundation ✅ → Session & Message System ✅ → AI Service Setup (next)