Add a complete OpenAPI 3.1 specification covering ~55 public API endpoints
across 8 categories (Stacks, Containers, API Tokens, Webhooks, Nodes, Fleet,
Scheduled Tasks, Health). Wire it into Mintlify via native OpenAPI rendering
with an interactive "Try It" playground and a dedicated API Reference tab.
Includes an API overview page documenting authentication, token scopes,
node routing, error format, license tier requirements, and WebSocket endpoints.
Anso