feat(tracking): ship the shell rebuild — k8s replicas 3 + REDIS_ONLY + HPA, partitioned ingest live

- deploy/k8s/25-tracking-orders.yaml: SHELL-REBUILD gating removed (LIVE) —
  replicas 3 + RollingUpdate, actor-pool=tracking label + POD_IP/NAMESPACE,
  REDIS_ONLY=1, TRACKING_PARTITIONS=16, HPA 3..12
- deploy/k8s/00-namespace-config.yaml: tracking PVC note → rebuild live (mount
  vestigial, kept for rollback)
- deploy/docker-compose.yml: TRACKING_PARTITIONS=16 on the reader producer +
  tracking consumer (partitioned ingest in the dev stack too)
- deploy/k8s/build-push.sh: gocartactor named context for the tracking image
- platform: rabbit.PublishEventTo (caller routing key) + event.PartitionOf /
  PartitionRoutingKey (shared §8 fnv1a hash) + tests
- docs: plan-tracking-shell-rebuild.md (config write half, pod-watcher
  assignment, real-AOF tape gate, R6 re-measure), status.md, CONTEXT,
  event-sourcing-stance, platform-architecture-review, read-model-projections;
  scripts/load-test-coordinator.sh
- submodules: slask-tracking ecbf894 (shell rebuild), slask-finder 84f7ff7
  (§8 partition-routed producer)

🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>

rabbit/topic.go

@@ -14,6 +14,15 @@ import (
 // exchange must already exist (declare it with ListenToPattern or call
 // ExchangeDeclare explicitly before the first publish).
 func PublishEvent(c *amqp.Connection, exchange string, ev event.Event) error {
+	return PublishEventTo(c, exchange, string(ev.Type), ev)
+}
+
+// PublishEventTo marshals an event.Event and publishes it to exchange with the
+// caller-supplied routingKey. PublishEvent hardcodes routingKey =
+// string(ev.Type); partitioned producers (track.partition.{N}) supply their own
+// routing key here. Opens and closes a channel per call; the exchange must
+// already exist.
+func PublishEventTo(c *amqp.Connection, exchange, routingKey string, ev event.Event) error {
 	body, err := json.Marshal(ev)
 	if err != nil {
 		return err
@@ -23,7 +32,7 @@ func PublishEvent(c *amqp.Connection, exchange string, ev event.Event) error {
 		return err
 	}
 	defer ch.Close()
-	return ch.Publish(exchange, string(ev.Type), true, false, amqp.Publishing{
+	return ch.Publish(exchange, routingKey, true, false, amqp.Publishing{
 		ContentType:  "application/json",
 		Body:         body,
 		DeliveryMode: amqp.Persistent,