Establish Railiance Fabric graph model

examples/declarations/valid/dependency-flex-auth-runtime-secrets.yaml

@@ -0,0 +1,31 @@
+apiVersion: railiance.fabric/v1alpha1
+kind: DependencyDeclaration
+metadata:
+  id: flex-auth.api.needs-runtime-secrets
+  name: flex-auth runtime secrets dependency
+  owner: flex-auth
+  repo: flex-auth
+  domain: railiance
+  source_links:
+    - label: flex-auth deployment values
+      path: deploy/values.yaml
+spec:
+  lifecycle: active
+  environments: [dev, staging, prod]
+  consumer_service_id: flex-auth.api
+  requires:
+    capability_type: runtime-secrets
+  interface:
+    type: openbao-kv-v2-mount
+    version_constraint: ">=v1 <v2"
+  auth:
+    method: kubernetes_service_account
+    audience: openbao
+  criticality: critical
+  data_classification: secret
+  fallback:
+    mode: none
+    description: flex-auth cannot start without runtime secrets.
+  compatibility:
+    requires:
+      - openbao-kv-v2-mount v1