fix: resolve breaking change in migration to concurrent declarative as default

Author: aaronsteers

airbyte_cdk/connector_builder/connector_builder_handler.py

@@ -62,11 +62,13 @@ def should_normalize_manifest(config: Mapping[str, Any]) -> bool:
 
 def create_source(
     config: Mapping[str, Any],
-    limits: TestLimits,
-    catalog: Optional[ConfiguredAirbyteCatalog],
-    state: Optional[List[AirbyteStateMessage]],
+    limits: TestLimits | None = None,
+    catalog: ConfiguredAirbyteCatalog | None = None,
+    state: List[AirbyteStateMessage] | None = None,
 ) -> ConcurrentDeclarativeSource[Optional[List[AirbyteStateMessage]]]:
     manifest = config["__injected_declarative_manifest"]
+    catalog = catalog or None
+    state = state or None
 
     # We enforce a concurrency level of 1 so that the stream is processed on a single thread
     # to retain ordering for the grouping of the builder message responses.