webhooks: harden scheduler bootstrap + tidy public exports

backend/app/services/webhooks/__init__.py

@@ -1,3 +1,22 @@
-"""Webhook queueing and dispatch utilities."""
+"""Webhook queueing + dispatch utilities.
 
-__all__ = ["dispatch", "queue", "scheduler"]
+Prefer importing from this package when used by other modules.
+"""
+
+from app.services.webhooks.dispatch import run_flush_webhook_delivery_queue
+from app.services.webhooks.queue import (
+    QueuedWebhookDelivery,
+    dequeue_webhook_delivery,
+    enqueue_webhook_delivery,
+    requeue_if_failed,
+)
+from app.services.webhooks.scheduler import bootstrap_webhook_dispatch_schedule
+
+__all__ = [
+    "QueuedWebhookDelivery",
+    "bootstrap_webhook_dispatch_schedule",
+    "dequeue_webhook_delivery",
+    "enqueue_webhook_delivery",
+    "requeue_if_failed",
+    "run_flush_webhook_delivery_queue",
+]