Improved cost transparency with usage-based billing

What this post added

This post introduces the Temporal Cloud Billing API and the Billable Action Count metric. The Billing API allows for namespace- and tag-level cost attribution with hourly granularity, accessible through the Cloud Ops API, CSV downloads, and integrations with Datadog Cloud Cost Management and Vantage. The Billable Action Count metric provides usage information for namespaces and workflow types down to one-minute granularity via the OpenMetrics endpoint. The post also details the internal implementation of the Billing API using Temporal Workflows for report generation, including queueing and rate-limiting mechanisms.