Food and Rent read OpenVibe.Sources' items (the FDA's food recalls; HUD's Fair Market Rents) (#305)

ddiff --git a/server/identity/principals.js b/server/identity/principals.js
iindex 26758674..468f2cf6 100644
---- a/server/identity/principals.js
++++ b/server/identity/principals.js
@@@ -294,6 +294,10 @@ const DEFAULT_GRANTS = [
      // Rent's AI pillar: rent.screen_listing screens each posted listing for scam signs for Rent's staff (AI#87).
      ['rent', 'ai.run.create', 'openvibe.ai', ['rent.*']],
      ['rent', 'ai.run.read', 'openvibe.ai', ['rent.*']],
++    // Sources is the one ingestion registry (plan F, contracts 0.210.0 categories): Food shows the FDA's food recall
++    // reports (category food) and Rent HUD's Fair Market Rents (category housing) from it instead of fetching them.
++    ['food', 'sources.item.read', 'openvibe.sources', []],
++    ['rent', 'sources.item.read', 'openvibe.sources', []],
      // Plan T13: OpenVibe.Services merges every authority's resource index (ADR-048 section 3): it reads each one's
      // GET /api/v1/resources under that authority's <id>.resource.read, with a token for that authority's audience.
      ['services', 'network.resource.read', SELF_AUDIENCE, []],