Architect Data Action HTTP timeout 3s limit

Trying to understand the hard limit on Data Action timeouts. My external API returns 200 OK but takes 5200ms. The flow fails with Error: Request timeout after 3000ms. I see no property in the architect_data_action JSON schema to increase this beyond 3000. Is there a hidden config or must I optimize the downstream service? POST /api/v2/architect/flows payload confirms default timeout. KST timezone context irrelevant but noted.