TopicRuleEventSource
Source:
src/AWS/IoT/TopicRuleEventSource.ts
Event source connecting an IoT topic filter to the hosting compute.
The contract is a Context service consumed via
consumeTopicMessages; the Lambda implementation layer is
AWS.Lambda.TopicRuleEventSource, which deploys an IoT TopicRule
with a Lambda action (plus the invoke permission) and streams matching
messages into the registered handler.