Data Action timeout hard-capped at 3s despite configuration

Configured a POST Data Action in Architect to hit an internal microservice. The endpoint consistently takes 4-5 seconds to process the payload. I’ve set the timeout field to 10 in the Data Action JSON, but the flow fails immediately with a 408 Request Timeout after exactly 3 seconds.

{
 "method": "POST",
 "url": "https://internal-api.example.com/process",
 "timeout": 10,
 "headers": {
 "Content-Type": "application/json"
 },
 "body": "{\"id\": \"${interaction.id}\"}"
}

Is there a global property or a different field I need to toggle to push this limit past the 3-second floor? The docs don’t mention a hard cap, but the behavior is consistent across multiple actions.