Azure Service Bus enterprise messaging service. Covers queues, topics,
sessions, and transactions. Use for Azure-native enterprise
messaging and hybrid cloud scenarios.
USE WHEN: user mentions "azure service bus", "service bus queues", "service bus topics", "sessions", "azure messaging", asks about "azure queue", "managed identity", "subscription filters"
DO NOT USE FOR: AWS-native - use `sqs`; GCP-native - use `google-pubsub`; event streaming - use Event Hubs or `kafka`; on-premise - use `rabbitmq` or `activemq`; lightweight - use `nats`