Add federation integration example

docs/federation-implementation-notes.md

@@ -208,6 +208,36 @@ Core federation primitives are exposed via:
 - include/amduat/fed/replay.h
 - include/amduat/fed/view.h
 
+## Integration example (core flow)
+
+```c
+amduat_fed_registry_store_t reg_store;
+amduat_fed_registry_value_t reg_value;
+amduat_fed_domain_state_t reg_states[8];
+
+amduat_fed_registry_value_init(&reg_value, reg_states, 8);
+amduat_fed_registry_store_init(&reg_store, local_store);
+amduat_fed_registry_store_put(&reg_store, &reg_value, &reg_ref, NULL);
+
+if (amduat_fed_ingest_validate(records, record_count, NULL, NULL) !=
+    AMDUAT_FED_INGEST_OK) {
+  return false;
+}
+
+if (!amduat_fed_view_build(records,
+                           record_count,
+                           local_domain_id,
+                           bounds,
+                           bounds_len,
+                           denies,
+                           denies_len,
+                           &view)) {
+  return false;
+}
+
+resolve_err = amduat_fed_resolve(&view, local_store, ref, &artifact);
+```
+
 ## Policy gating
 
 - Admission gating is per-domain.