When initializing a container, `start_time` gets initialized as `source_data_identifier` on [line 371](https://github.com/tylerjchuba/soarsdk/blob/main/src/soarsdk/objects.py#L371). This line should be modified to: `self.start_time: str = kwargs.get("start_time")`
When initializing a container,
start_timegets initialized assource_data_identifieron line 371.This line should be modified to:
self.start_time: str = kwargs.get("start_time")