Establish Railiance Fabric graph model

examples/declarations/invalid/binding-bad-status.yaml

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+apiVersion: railiance.fabric/v1alpha1
+kind: BindingAssertion
+metadata:
+  id: flex-auth.api.bad-binding-status
+  name: Bad binding status
+  owner: flex-auth
+  repo: flex-auth
+  domain: railiance
+spec:
+  lifecycle: active
+  environments: [dev]
+  dependency_id: flex-auth.api.needs-runtime-secrets
+  provider_capability_id: railiance-platform.openbao.runtime-secrets
+  status: accepted
+  rationale: Invalid because accepted is not a binding status.

examples/declarations/invalid/capability-bad-lifecycle.yaml

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+apiVersion: railiance.fabric/v1alpha1
+kind: CapabilityDeclaration
+metadata:
+  id: railiance-platform.openbao.bad-lifecycle
+  name: Bad lifecycle capability
+  owner: railiance-platform
+  repo: railiance-platform
+  domain: railiance
+spec:
+  lifecycle: started
+  environments: [dev]
+  description: Invalid because lifecycle must use the shared enum.
+  capability_type: runtime-secrets
+  service_id: railiance-platform.openbao
+  criticality: high
+  data_classification: secret

examples/declarations/invalid/dependency-bad-environment.yaml

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+apiVersion: railiance.fabric/v1alpha1
+kind: DependencyDeclaration
+metadata:
+  id: flex-auth.api.bad-environment
+  name: Bad environment dependency
+  owner: flex-auth
+  repo: flex-auth
+  domain: railiance
+spec:
+  lifecycle: active
+  environments: [production]
+  consumer_service_id: flex-auth.api
+  requires:
+    capability_type: runtime-secrets
+  criticality: high
+  data_classification: secret

examples/declarations/invalid/interface-bad-auth.yaml

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+apiVersion: railiance.fabric/v1alpha1
+kind: InterfaceDeclaration
+metadata:
+  id: railiance-platform.openbao.bad-auth
+  name: Bad auth interface
+  owner: railiance-platform
+  repo: railiance-platform
+  domain: railiance
+spec:
+  lifecycle: active
+  environments: [dev]
+  description: Invalid because oauth2 is not in the initial auth-method enum.
+  interface_type: http-api
+  version: v1
+  service_id: railiance-platform.openbao
+  auth:
+    method: oauth2
+  data_classification: internal

examples/declarations/invalid/service-missing-id.yaml

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+apiVersion: railiance.fabric/v1alpha1
+kind: ServiceDeclaration
+metadata:
+  name: Missing ID Service
+  owner: railiance-platform
+  repo: railiance-platform
+  domain: railiance
+spec:
+  lifecycle: active
+  environments: [dev]
+  description: Invalid because metadata.id is required.