Roll an issues agent webhook signing secret
Replaces the signing secret for the given issues agent webhook and returns the updated webhook. Future deliveries are signed with the new secret immediately.
Authorizations
Response
OK
IssueStatuses scopes delivery to issues in one of these statuses. Nil/empty (the default) fires for every status.
OrganizationID is derived from the tenant on fetch (no stored column); the row carries it so Slack delivery can address the org-scoped install.
0, 1, 2, 3 Delivery target is either a URL or a Slack channel. SlackTeamID is the channel's workspace (which install to send through).

