Initial commit: AS4/411 directory and discovery service for Sankofa Marketplace

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/protocols/test-vectors/iso20022-as4/bic-resolution.json

@@ -0,0 +1,29 @@
+{
+  "description": "BIC-based resolution for ISO 20022 FI-to-FI. Service iso20022.fi, action credit.transfer.",
+  "request": {
+    "identifiers": [
+      { "type": "as4.partyId", "value": "BANKUS33XXX", "scope": "BIC" }
+    ],
+    "serviceContext": {
+      "service": "iso20022.fi",
+      "action": "credit.transfer"
+    }
+  },
+  "expectedResponse": {
+    "primary": {
+      "target_protocol": "as4",
+      "target_address": "https://as4.bankus.com/fi",
+      "transport_profile": "as4.fifi.iso20022.v1",
+      "security": {
+        "signRequired": true,
+        "encryptRequired": true,
+        "keyRefs": ["vault://certs/bankus/iso20022"]
+      },
+      "service_context": {
+        "service": "iso20022.fi",
+        "action": "credit.transfer"
+      }
+    },
+    "resolution_trace": [{ "source": "internal directory" }]
+  }
+}