docs: add DOI badge and canonical hol.org links

Signed-off-by: Michael Kantor <6068672+kantorcodes@users.noreply.github.com>

Author: kantorcodes

.zenodo.json

@@ -1,6 +1,6 @@
 {
   "title": "registry-broker-skills",
-  "description": "Skill definitions and CLI surfaces for Hashgraph Online Registry Broker discovery and chat workflows.",
+  "description": "Skill definitions and CLI surfaces for Hashgraph Online Registry Broker discovery and chat workflows. Canonical product URLs: https://hol.org/registry, https://hol.org/registry/skills, https://hol.org/docs/registry-broker/.",
   "upload_type": "software",
   "access_right": "open",
   "license": "apache-2.0",
@@ -23,6 +23,16 @@
       "relation": "isSupplementTo",
       "scheme": "url"
     },
+    {
+      "identifier": "https://hol.org/registry/skills",
+      "relation": "isDocumentedBy",
+      "scheme": "url"
+    },
+    {
+      "identifier": "https://hol.org/docs/registry-broker/",
+      "relation": "isDocumentedBy",
+      "scheme": "url"
+    },
     {
       "identifier": "https://hol.org/registry/api/v1/openapi.json",
       "relation": "documents",

README.md

@@ -5,6 +5,8 @@
 
 [![npm version](https://img.shields.io/npm/v/@hol-org/registry?style=for-the-badge&logo=npm&logoColor=white&label=@hol-org/registry)](https://www.npmjs.com/package/@hol-org/registry)
 [![npm version](https://img.shields.io/npm/v/@hashgraphonline/standards-sdk?style=for-the-badge&logo=npm&logoColor=white&label=standards-sdk)](https://www.npmjs.com/package/@hashgraphonline/standards-sdk)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.18748323.svg?style=for-the-badge)](https://doi.org/10.5281/zenodo.18748323)
+[![HOL Registry](https://img.shields.io/badge/HOL-Registry-5599FE?style=for-the-badge)](https://hol.org/registry)
 [![Run in Postman](https://img.shields.io/badge/Run_in-Postman-FF6C37?style=for-the-badge&logo=postman&logoColor=white)](https://app.getpostman.com/run-collection/51598040-f1ef77fd-ae05-4edb-8663-efa52b0d1e99?action=collection%2Ffork&source=rip_markdown&collection-url=entityId%3D51598040-f1ef77fd-ae05-4edb-8663-efa52b0d1e99%26entityType%3Dcollection%26workspaceId%3Dfb06c3a9-4aab-4418-8435-cf73197beb57)
 [![Import in Insomnia](https://img.shields.io/badge/Import_in-Insomnia-4000BF?style=for-the-badge&logo=insomnia&logoColor=white)](https://insomnia.rest/run/?label=Universal%20Agentic%20Registry&uri=https%3A%2F%2Fhol.org%2Fregistry%2Fapi%2Fv1%2Fopenapi.json)
 [![OpenAPI Spec](https://img.shields.io/badge/OpenAPI-3.1.0-6BA539?style=for-the-badge&logo=openapiinitiative&logoColor=white)](https://hol.org/registry/api/v1/openapi.json)