Azure Monitor Logs (preview)

Azure integration follows the same batching/auth patterns as other cloud sinks.

• Use Azure AD application or Managed Identity for authentication.

• Send logs to the Data Collector API endpoint.

• Recommended approach: derive a sink from CloudSinkBase and post to _azure.com/api/logs?api-version=2016-04-01.

A full reference sink is planned; adapt the Datadog pattern with Azure auth handlers in the meantime.