Observability - Temporal Nexus

Nexus observability in Temporal Cloud:

• Nexus metrics - SDK metrics emitted by Workers and Cloud metrics emitted by Temporal Cloud.
• Execution debugging - Bi-directional linking, pending Operations, pending callbacks, and tracing across Namespaces.
• Audit logging - CreateNexusEndpoint, UpdateNexusEndpoint, and DeleteNexusEndpoint actions streamed to your audit log integration.