Publish reciprocal canon federation interface

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a070b5-4994-7271-bd8b-7c3dbcedec4b

infospace/artifacts/index.yaml

@@ -1,4 +1,15 @@
 artifacts:
+  - id: interface-card/canon-federation
+    path: interfaces/federation.yaml
+    kind: interface-card
+    title: InfoTechCanon federation interface
+    provenance:
+      source_path: ../the-custodian/canon/architecture/adr-006-canon-federation-concept-ownership.md
+      placement: authored
+      placement_workplan: INFO-WP-0025
+    relationships:
+    - type: conforms_to
+      target: kernel/itc-core
   - id: assimilation/canon-federation
     path: assimilation/canon-federation/ASSIMILATION.md
     kind: assimilation