test: Add streaming integration tests

Author: sentrivana

sentry_sdk/traces.py

@@ -581,6 +581,7 @@ def _set_segment_attributes(self) -> None:
         self.set_attribute(
             SPANDATA.SENTRY_SDK_INTEGRATIONS, sorted(client.integrations.keys())
         )
+        self.set_attribute("sentry.span.source", SegmentSource.CUSTOM.value)
 
         if client.options.get("dist") and SPANDATA.SENTRY_DIST not in self._attributes:
             self.set_attribute(