Advanced AI Prompt for CloudWatch Synthetics Canary for API Health

Act as an API Reliability Engineer. Design a robust CloudWatch Synthetics Canary script utilizing the `syn-nodejs-puppeteer` runtime framework, specifically engineered to constantly monitor the mission-critical [API_ENDPOINT]. The Node.js canary payload must programmatically execute a [HTTP_METHOD] (e.g., POST with a mocked JSON payload), rigorously validate that the response strictly matches the [EXPECTED_STATUS] code, and calculate if the total round-trip response time successfully satisfies the strict [LATENCY_SLA] threshold. Inject error-handling logic instructing the Puppeteer engine to capture an automated screenshot of the DOM and dump the network HAR logs directly into a secure S3 bucket upon any failure. Output the Terraform HCL to fully provision this Canary, alongside a CloudWatch Alarm configured to trigger PagerDuty if the `SuccessPercent` metric drops below 95%.