feat: add dedicated message-exchange for task lifecycle notifications
- add constants/message.go with MessageTask* categories and message-exchange /
message-queue / dead-letter routing constants
- add mq/publish_message.go with PushMessageToRabbitMQ (confirm mode,
dead-letter queue) separate from the existing event-exchange publisher
- add mq/emit.go with TryEmitMessage for non-blocking, OTel-traced dispatch
- add mq/event/task_event_gen.go with NewTaskSubmitted/Running/Completed/
Failed/CancelledMessage constructors
- wire TryEmitMessage into task worker and create/cancel handlers so all 5
lifecycle transitions are published (previously task.* routed to
event-exchange with no matching binding, causing silent drops)
- harden Dockerfile: scratch final image, pinned alpine:3.21 certs stage,
apk upgrade in builder, add -trimpath -mod=readonly go build flags
- add full K8s manifests under deploy/k8s/ for Redis, RabbitMQ (mTLS),
ModelRT (Downward API, scratch image, readOnlyRootFilesystem), Jaeger,
Loki, Promtail, Grafana
- expand deploy.md with async_task SQL schema, TLS cert generation steps,
K8s deployment procedures, and SSH tunnel configuration
douxu
42956d1793