Datadog keeps posting solid growth and rolling out new AI-focused features -- but the stock's rich price tag and intensifying competition leave little room for error.Datadog (DDOG -0.04%) has been a steady winner as observability becomes essential infrastructure in the cloud era. The monitoring-and-security platform specialist sells a broad suite that helps developers and security teams watch over applications, logs, infrastructure, and now artificial intelligence (AI) systems.The business itself continues ...