agent.json names /openapi.json, which Report now serves (#90)

ddiff --git a/server/agent-descriptor.js b/server/agent-descriptor.js
iindex abf1808..adb6505 100644
---- a/server/agent-descriptor.js
++++ b/server/agent-descriptor.js
@@@ -1,7 +1,7 @@
  'use strict';
  // What openvibe.report tells an agent about itself (openvibe-shared/agent-layer): /.well-known/agent.json.
--// Every field is something this site really serves: its JSON API, its API page, and the crawl files it publishes.
--// No OpenAPI document and no MCP endpoint exist for Report, so neither is named.
++// Every field is something this site really serves: its JSON API, its API page, its OpenAPI document (/openapi.json,
++// from the contracts, SEO-3) and the crawl files it publishes. No MCP endpoint exists for Report, so none is named.
  module.exports = {
      id: 'report',
      name: 'OpenVibe.Report',
@@@ -10,6 +10,7 @@ module.exports = {
      site: 'openvibe.report',
      api: '/api/v1',
      docs: '/developers',
++    openapi: '/openapi.json',
      policy: {
          auth: ['none'],
          rateLimit: '120 API requests a minute per address',