Type-Safe API Integration

Generate a type-safe API client for {{api_name}}.

API documentation: {{api_docs_url_or_description}}
Endpoints I need:
{{endpoint_list}}

Requirements:
- Full TypeScript types for every request body and response shape
- Zod schemas that validate responses at runtime (don't trust the API)
- Generic fetch wrapper with:
  - Automatic retry on 429/503 with exponential backoff (max 3 retries)
  - Request timeout of {{timeout_ms}}ms
  - Auth header injection from {{auth_source}}
  - Response type narrowing (success vs error)
- Individual functions per endpoint (not a class with methods)
- Each function should accept typed params and return a typed Result<T, ApiError>

Error handling:
- Network errors → { type: 'network', message, retryable: true }
- Validation errors → { type: 'validation', message, raw: unknown }
- API errors → { type: 'api', status, message, code }

Generate the types file and client file separately. Export everything needed for consumers.