Subscriptions endpoints

Method	Path (example)	Description
GET	/subscriptions	Plan list
POST	/subscriptions	Create plan (SUPERADMIN)
PATCH/DELETE	/subscriptions/:id	Update / delete
POST	/subscriptions/:id/assign	Assign to organization

Plan body (conceptual)

{
  "name": "Pro",
  "features": {
    "analytics_bots": true,
    "data_sources": true,
    "workflows": false,
    "live_chat": true
  },
  "limits": {
    "projects": 50,
    "agents": 200,
    "knowledgeBases": 20,
    "knowledge_files": 5000,
    "storage_mb": 10240,
    "integrations": 100
  }
}

Field names must match the backend schema exactly.