Provision brief table

Create or repair the Agent Teams enrichment table for a campaign brief. Runs the GTM Engineer table blueprint lane, binds available provider credentials, stamps table-build readiness, and returns the table id. Idempotent.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "provision-brief-table",
    "arguments": {
      "briefId": "00000000-0000-4000-8000-000000000000",
      "allowHostedAi": true
    }
  }
}