Fire a named webhook event type for a test case.

Fires a real current-state webhook event for any registered Customer API event type against a test case — even if the case hasn't naturally reached the state that would produce that event.

Purpose: Unblocks testing webhook handlers for rare or hard-to-reach event types (e.g. case.closed, chat.created) without having to drive the case through its full lifecycle.

Payload: The event carries the real current state of the case — fields are read from the case as it exists now. No payload fabrication or override is supported in this version.

Event types:

• case.created — current lifecycle (use after case creation, or to re-test your handler)
• case.updated — current lifecycle (oldLifecycle and newLifecycle both reflect current state)
• case.closed — current close code and comment (use after case is already closed, or to test your handler regardless)
• payment.created — most recent payment on the case (returns 422 if no payments exist)
• payment.deleted — most recently deleted payment on the case (returns 422 if no payments have been deleted)
• chat.created — most recent chat message on the case (returns 422 if no chats exist)

Target subscriptions:

• If subscriptionId is provided, fires only to that subscription. Returns 400 if the subscription is not found, not a test subscription, or not owned by this creditor.
• If omitted, fires to all active test subscriptions registered for the given event type.

Event log (asynchronous): The synthetic fire is enqueued into the normal delivery pipeline, exactly like a real dispatch. A successful response (and its enqueuedCount) confirms the event was queued — it does not mean a row already exists in the webhook event log. The WebhookEvent row appears in GET /webhooks/events only after the worker drains the queue and attempts delivery — usually within a few seconds, but allow up to ~30 seconds, as the queue drain can lag under load. Do not assume the row is present the instant this call returns: poll GET /webhooks/events?caseId={id} with a short backoff until the event appears (or a ~30s timeout elapses) rather than reading it once immediately.

Guards:

• Returns 400 if the case is not a test case (classification != test), the event type is not valid, or the subscription is not found/not owned.
• Returns 404 if the case is not found or not owned by this creditor.
• Returns 422 if required data is missing (e.g. no payments for payment.created, no chats for chat.created).