fix: enforce atomic agent registration contract

sdks/node/src/index.ts

@@ -1,5 +1,6 @@
 export { ElydoraClient } from './client.js';
 export { ElydoraError } from './errors.js';
+export { INTEGRATION_TYPES } from './types.js';
 
 export {
   jcsCanonicalise,
@@ -24,6 +25,7 @@ export type {
   KeyStatus,
   ExportStatus,
   RbacRole,
+  IntegrationType,
   ErrorCode,
 
   // Entities