IBM MQ endpoints can be browsed and consumed

IBM MQ support now includes endpoint configuration, queue discovery, non-destructive message browsing, message type matching, and operator screens for consumers. Consumers run on the shared ingest pipeline used by CDC, with per-message code page handling, unit-of-work settlement, dead letter options, and visible running state. [[feature:ibm-mq-support|IBM MQ: browse, send, consume, and publish queue APIs]] also separates the message channel from the admin channel so browsing and discovery use the right authority.