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

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

examples/embedded-library/index.js

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+/**
+ * Example: embedded library usage.
+ * Imports core + resolver + in-memory store; no REST API. Resolution runs in-process.
+ */
+import { Resolver, InMemoryResolveCache } from "@as4-411/resolver";
+import { InMemoryDirectoryStore } from "@as4-411/storage";
+
+const store = new InMemoryDirectoryStore();
+store.addTenant({ id: "default", name: "Default" });
+store.addParticipant({ id: "local-1", tenantId: "default", name: "Local Participant" });
+store.addIdentifier({
+  id: "id-1",
+  participantId: "local-1",
+  identifier_type: "e164",
+  value: "+15551234567",
+  priority: 1,
+});
+store.addEndpoint({
+  id: "ep-1",
+  participantId: "local-1",
+  protocol: "https",
+  address: "https://local.example.com/receive",
+  priority: 1,
+  status: "active",
+});
+
+const resolver = new Resolver({
+  store,
+  cache: new InMemoryResolveCache(),
+  defaultTtlSeconds: 60,
+});
+
+const result = await resolver.resolve({
+  identifiers: [{ type: "e164", value: "+15551234567" }],
+  tenant: "default",
+});
+
+console.log("Embedded resolve:", result.directives.length, "directive(s)");
+console.log(result.directives[0]?.target_address ?? "none");

examples/embedded-library/package.json

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+{
+  "name": "example-embedded-library",
+  "type": "module",
+  "private": true,
+  "dependencies": {
+    "@as4-411/core": "workspace:*",
+    "@as4-411/resolver": "workspace:*",
+    "@as4-411/storage": "workspace:*"
+  }
+}