fix(outbox): Consumer-Registry zeigt qualname — unterscheidet gleichnamige Handler ueber Plugins hinweg

app/core/outbox.py

@@ -212,11 +212,18 @@ def _json_payload(payload: dict[str, Any]) -> str:
 
 
 def _get_handler_name(handler: Any) -> str:
-    """Extract a human-readable name from a handler callable."""
-    name = getattr(handler, "__name__", None)
+    """Extract a human-readable name from a handler callable.
+
+    Prefers ``__qualname__`` (includes the owning class, e.g.
+    ``AutomationPlugin.on_contact_created``) over ``__name__`` so the
+    consumer registry distinguishes handlers that share a method name
+    across plugins (automation/unified_search/system_notif all define
+    ``on_contact_created`` — three distinct handlers, same short name).
+    """
+    name = getattr(handler, "__qualname__", None)
     if name:
         return name
-    name = getattr(handler, "__qualname__", None)
+    name = getattr(handler, "__name__", None)
     if name:
         return name
     return str(handler)