Publish federation interface and reviewed upstream imports

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

canon.yaml

@@ -1,7 +1,7 @@
 repository: commerce-canon
 title: CommerceCanon
 status: draft
-version: 0.2.0-draft
+version: 0.3.0-draft
 description: Counterparty and commercial-relationship semantics importing shared InfoTechCanon concepts.
 classification:
   kernel: Canon purpose, ownership boundary, and contribution rules.
@@ -29,3 +29,9 @@ models:
     ledger_locator: counterparty
 standards: []
 planned_models: []
+
+interface_cards:
+  - id: commerce-canon/federation-interface
+    path: infospace/interfaces/federation.yaml
+    status: published
+    version: 0.1.0