fix: create room if roomId is provided but doesn't exist

[sweetmantech]

Summary

• Fixes foreign key constraint error when a roomId is provided to setupConversation but the room doesn't actually exist in the database
• Now checks if the room exists when roomId is provided, and creates it if needed
• Adds test coverage for the new behavior

Problem

The error occurred because:

1. Client sends a request with a roomId that doesn't exist in the database
2. setupConversation assumed if roomId is provided, the room exists
3. It skipped room creation and tried to insert a memory
4. Foreign key constraint failed: Key (room_id)=(...) is not present in table "rooms"

Test plan

• Existing tests pass
• New test case: "creates a room when roomId is provided but room does NOT exist"
• Updated test case: "does NOT create a room when roomId is provided and room exists"

🤖 Generated with Claude Code

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Project	Deployment	Review	Updated (UTC)
recoup-api	Ready	Preview	Jan 19, 2026 8:24pm

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