fix: WeasyPrint URL fetcher + attachment improvements + webhook error propagation + WebSocket conversation check + RLS disabled on system tables (bootstrap fix)

app/core/webhook_dispatcher.py

@@ -68,7 +68,11 @@ async def _dispatch_single(
     event_name: str,
     data: dict[str, Any],
 ) -> None:
-    """Send a webhook and log the result."""
+    """Send a webhook and log the result. Raises on failure (P1.5 fix).
+
+    Previously errors were swallowed, causing the outbox to mark events
+    as 'published' even when webhook delivery failed.
+    """
     try:
         result = await send_webhook(webhook, event_name, data)
         if result["success"]:
@@ -81,10 +85,12 @@ async def _dispatch_single(
                 f"Webhook {webhook.id} failed for {webhook.url} "
                 f"event {event_name}: {result.get('error')}"
             )
+            raise RuntimeError(f"Webhook {webhook.id} failed: {result.get('error')}")
     except Exception as exc:
         logger.error(
             f"Webhook {webhook.id} dispatch error for {webhook.url}: {exc}"
         )
+        raise  # Re-raise so outbox can retry (P1.5 fix)
 
 
 def register_webhook_event_handlers(event_bus: EventBus | None = None) -> None: