Network: Chat may check AI consent for its room insight (#766)

ddiff --git a/server/identity/principals.js b/server/identity/principals.js
iindex 433108fc..3720d868 100644
---- a/server/identity/principals.js
++++ b/server/identity/principals.js
@@@ -166,6 +166,10 @@ const DEFAULT_GRANTS = [
      ['chat', 'media.object.delete', 'openvibe.media', ['chat']],
      ['chat', 'ai.run.create', 'openvibe.ai', ['chat.*', 'ai.complete']],
      ['chat', 'ai.run.read', 'openvibe.ai', ['chat.*']],
++    // Chat's room insight summarises only the messages of people who allowed AI use of them (plan L24,
++    // purpose ai.train on kind chat): the job asks /internal/consent/check for the authors of its window.
++    // Fail-closed: no answer leaves everyone out, as the consent contract says.
++    ['chat', 'network.consent.read', SELF_AUDIENCE, []],
      // Activated when Contracts includes exchange.chat.export; only Chat imports a person's old chats.
      ...(capabilities.get('exchange.chat.export') ? [['chat', 'exchange.chat.export', 'openvibe.exchange', []]] : []),
      // Chat's AI members linked to a Food household read its pantry and plan (food.household.read; Contracts 0.189.0).