[API Surface] State-aware: Remove 'phase' operations from json schema

### Description of the task

State aware operations don't belong in json schema. They should be APIs.

### Additional context

_No response_

The issue names no files, tests, or entry points. Start by locating the JSON schema definitions and the state-aware “phase” operations, then trace the corresponding API definitions. Done means phase operations are absent from the JSON schema and represented as APIs instead.

Written by the indexing model from the issue text.