bootstrap: planned object-storage reef, no rail

Declare reef-storage as substrate_kind object-storage. Hold non-secret
attribute paths for Scaleway S3. Do not host a compute rail.

.repo-classification.yaml

@@ -0,0 +1,23 @@
+repo_classification:
+  standard: Repo Classification Standard
+  version: "1.0"
+  classified_at: "2026-08-14"
+  classified_by: agent
+  category: project
+  domain: financials
+  secondary_domains:
+    - infotech
+  capability_tags:
+    - platform
+    - operations
+    - storage
+    - governance
+  business_stake:
+    - technology
+    - operations
+  business_mechanics:
+    - coordination
+    - operation
+  repo_family: reef
+  ownership_repo: railiance-platform
+  substrate_kind: object-storage