Thread group-collection markers through the apply engine — a name-only
resource modeled field-for-field on extension_points (§5.5): Bundle.collections,
CurrentState.collection_names, Plan.collections (+ is_noop), diff_collections
(declared→Create / live-undeclared→Delete / else NoOp), load_current loads the
names, reconcile_node_tx inserts on Create + deletes on prune via
group_collection_repo, state_token folds in coll|<name>, validate_bundle
rejects empty/duplicate names (no reserved-name guard — a collection is a data
namespace, not an importable module), ApplyReport gains collections_created/
deleted. Pruning a marker removes only the declaration; the group_kv_entries
data survives until the owning group is deleted.
The apply engine stays owner-generic; restricting declarations to [group] nodes
is enforced at the CLI manifest layer (next commit).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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