Agents
List org agents, trials, checkout, and token top-up.
GET /api/organizations/{id}/agents
POST /api/organizations/{id}/agents/{agentId}/trial
POST /api/organizations/{id}/agents/{agentId}/checkout
POST /api/organizations/{id}/agents/{agentId}/token-topup/checkoutGET returns catalog entries plus org-specific status (trial, subscription, token balance). Trial and checkout require appropriate org relations (member for use, admin for billing actions where enforced).
