Bootstrap grouped home reef repo

declarations/reef.yaml

@@ -0,0 +1,24 @@
+kind: substrate-reef
+reef_id: reef-railiance
+repo: reef-railiance
+ownership_repo: railiance-infra
+substrate_kind: server-group
+lifecycle_state: active
+criticality: high
+primary_rail: rail-kubernetes
+hosted_rails:
+  - rail-kubernetes
+bound_rapps: []
+current_members:
+  - Railiance01
+source_documents:
+  - repo: railiance-master
+    path: docs/reef-first-wave-rollout.md
+  - repo: railiance-master
+    path: docs/reef-substrate-model.md
+  - repo: railiance-infra
+    path: docs/reef-first-wave-source-map.md
+compatibility_notes:
+  - Railiance01 is the first current member of the grouped home reef.
+  - Additional Railiance home servers should join this reef when they share the same substrate boundary.
+  - Split the grouped reef later if member lifecycle, access, or workload-placement policy diverges.