Address Jacob's review feedback on PR #13397 by explicitly marking the
three /api/history operations as deprecated in the OpenAPI spec:
* GET /api/history -> superseded by GET /api/jobs
* POST /api/history -> superseded by /api/jobs management
* GET /api/history/{prompt_id} -> superseded by GET /api/jobs/{job_id}
Each operation gains deprecated: true plus a description that names the
replacement. A formal sunset timeline (RFC 8594 Deprecation and RFC 8553
Sunset headers, minimum-runway policy) is being defined separately and
will be applied as a follow-up.
Adds a comprehensive OpenAPI 3.1 spec documenting all HTTP endpoints
exposed by ComfyUI's server, including prompt execution, queue management,
file uploads, userdata, settings, system stats, object info, assets,
and internal routes.
The spec was validated against the source code with adversarial review
from multiple models, and passes Spectral linting with zero errors.
Also removes openapi.yaml from .gitignore so the spec is tracked.
