Instance API restore status is not aggregated to Component

[leon-ape]

Problem

When the Instance API is enabled, restore status stops at the PVC layer:

• Instance does not aggregate Restore conditions from its restore PVCs.
• InstanceSet v2 does not aggregate Restore conditions from its desired Instances.
• Component and Cluster therefore remain Restore=Unknown even after physical PVC restore succeeds or fails.

This can leave restore intent and Cluster restore-protection finalizers in place indefinitely.

Expected behavior

Restore status should flow through:

PVC -> Instance -> InstanceSet -> Component -> Cluster

The aggregation must preserve failure-first semantics and report progress even before workload Pods or desired Instances exist.