Approvals API - Nasiko

Not in the generated OpenAPI spec. Behavioral guide: Approvals.

Method	Path	Who
`GET`	`/api/hitl/pending`	Owner
`GET`	`/api/hitl/{id}`	Owner
`POST`	`/api/hitl/{id}/resolve`	Owner
`POST`	`/api/hitl/{id}/cancel`	Owner
`GET`	`/api/hitl/{id}/stream`	Owner (SSE)
`POST`	`/api/hitl/{id}/requeue`	Superuser

Resolve body fields depend on kind (tool_approval, input_required, auth_required) — see the guide.