Replace an endpoint flow's screen map

PUT 
/api/channels/:channel/whatsapp/flows-endpoint/flows/:key

Edits OUR half only — the screen map the data endpoint answers from. The published Flow JSON stays versioned at Meta. This is how "unknown screen" drift is fixed without republishing anything.

Request

Responses

200

Screen map replaced.

403

Authenticated but not allowed.

404

No endpoint flow under this key.

422

The screen map is invalid (reasons in message).