agent.json names /openapi.json, which this site now serves (#205)

ddiff --git a/server/agent-descriptor.js b/server/agent-descriptor.js
iindex cc11a5f..712447e 100644
---- a/server/agent-descriptor.js
++++ b/server/agent-descriptor.js
@@@ -3,6 +3,7 @@
  // Every field is something this host really serves: the public pages (food near you, the meal planner, the food
  // list and one food, recalls, the recipe library, the update log), the JSON API under /api/v1, llms.txt and the
  // sitemap. No OpenAPI document or MCP endpoint is published here, so none is named.
++// 11-03 (SEO-3): this site serves /openapi.json now (the contracts' document for it), so it is named below.
  module.exports = {
      id: 'food',
      name: 'OpenVibe.Food',
@@@ -10,6 +11,7 @@ module.exports = {
      home: 'https://openvibe.food',
      site: 'openvibe.food',
      api: '/api/v1',
++    openapi: '/openapi.json',
      policy: {
          auth: ['none', 'Network OIDC'],
          rateLimit: 'Pages and /api/v1 are limited per address to 300 and 240 requests a minute; the place search is limited per caller to 10 requests a minute and 120 an hour (its answers are cached for a week)',