Resolves each shard topic's replica broker IDs (internal/kafka.Admin.
ReplicaBrokerIDs) to the topology.kubernetes.io/zone labels of the nodes
hosting those brokers (ZoneLocator), and writes the result into
ShardStatus.AvailabilityZones each reconcile. Uses mgr.GetAPIReader()
rather than the cached client for the Pod/Node lookups, since the cached
client would otherwise require cluster-wide list/watch RBAC on Pods just
to serve occasional point Gets.
main.go called Reconcile(ctx, req.Name) without req.Namespace, so the
Get against the namespaced Queue CRD always 404'd and was silently
swallowed as success -- no shard topics or Redis state were ever created.
Separately, ShardStatus.HashRangeStart/End were uint32, but controller-gen
maps that to OpenAPI format:int32, whose max (2147483647) is smaller than
FullHashRangeEnd (0xFFFFFFFF), so the apiserver rejected every status
update with the (misleadingly empty-looking) "must be of type integer with
format int32" error. Widened to int64, regenerated the CRD, and synced the
chart's bundled copy.
QueueSpec/QueueStatus model the shard-based (Kinesis-style hash-range
splitting) queue lifecycle object, with the controller-gen-generated
deepcopy and CRD YAML.
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