CHW-4705 WebhookIDRequired

webhook id is required in the path; use /api/webhooks/{id}

Default message: webhook id is required in the path; use /api/webhooks/{id}
HTTP status: 400 (client)

Problem. /api/webhooks/ was called without an id segment. Cause. Clients must address a specific webhook for item-level operations. Fix. Include the id (e.g. /api/webhooks/wh-123). HTTP 400.