Conversation context lost between Aria chat API calls — no session continuity

[HappyLiang12]

Bug Description

Each POST /api/v1/aria/chat call creates a new conversationId. Aria does not remember previous conversations. There is no way to continue a conversation or reference prior context.

Reproduction

1. POST /api/v1/aria/chat {message: 'Remember: the project uses Java 21'} → conversationId=ff83e8d1...
2. POST /api/v1/aria/chat {message: 'What do you remember about the project?'} → conversationId=34f6336a... (different!)
3. Aria has no memory of the first conversation

Expected Behavior

• Subsequent calls should continue the same conversation (same conversationId)
• Or provide a conversationId parameter to resume a specific conversation
• Aria should recall context from prior turns in the same session

Impact

• Memory → skill → knowledge progression is broken (can't build on prior context)
• Each interaction is stateless — Aria starts from scratch every time
• Users must repeat context in every message

Environment

• Branch: main @ d65f916, h2 profile