fix: display event signatures as strings

silverback/application.py

@@ -131,7 +131,7 @@ def add_taskiq_task(handler: Callable) -> AsyncTaskiqDecoratedTask:
                 # Address is almost a certainty if the container is being used as a filter here.
                 if contract_address := getattr(container.contract, "address", None):
                     labels["contract_address"] = contract_address
-                labels["event_signature"] = container.abi.signature
+                labels["event_signature"] = f'"{container.abi.signature}"'
 
             broker_task = self.broker.register_task(
                 handler,