[patelchaitany]

The operator is documented to add opendatahub.io/feast: "true" to any namespace holding a deployed FeatureStore, so dashboards can discover Feast namespaces cluster-wide via that label selector. The reconcile wiring for it was dropped during an upstream merge, leaving access.EnsureNamespaceLabel and access.RemoveNamespaceLabelIfLast orphaned while the manager-role kept the now-unused namespaces: update permission.

Wire both back into Reconcile:

• Add the label in the post-deploy block, gated on the Ready condition, so it lands only after the FeatureStore is actually deployed.
• Remove it on both deletion paths (CR-not-found and DeletionTimestamp set), and only when no other live FeatureStore remains in the namespace.
• Run the removal before the namespace-registry and OpenLineage cleanups, which return early on error and would otherwise strand the label.

countOtherFeatureStoresInNamespace returns (int, error) so a List failure keeps the label in place, rather than the -1 sentinel used elsewhere which fails the > 0 check and unlabels the namespace on any transient API error.

Regenerated with make manifests generate bundle, which produced no manifest changes: the marker already granted core/namespaces: get;list;watch;update.

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