Add monitoring to airflow tasks

[LDiazN]

We're not currently collecting metrics about airflow, we're particularly interested on:

• Failure of workflows
• Workflow landing times

Some things that might be useful:

• https://airflow.apache.org/docs/apache-airflow/stable/administration-and-deployment/logging-monitoring/metrics.html
• statsd exporter: https://github.com/prometheus/statsd_exporter