move sse to models

Author: giancarloromeo

packages/service-library/src/servicelib/sse/models.py renamed to packages/models-library/src/models_library/sse.py

@@ -9,6 +9,7 @@
     TaskResult,
     TaskStatus,
 )
+from models_library.sse import SSEEvent, SSEHeaders
 from servicelib.aiohttp import status
 from servicelib.aiohttp.long_running_tasks.server import (
     get_long_running_manager,
@@ -23,7 +24,6 @@
 )
 from servicelib.celery.models import OwnerMetadata
 from servicelib.long_running_tasks import lrt_api
-from servicelib.sse.models import SSEEvent, SSEHeaders
 from simcore_service_webserver.tasks._controller._rest_schemas import TaskPathParams
 
 from ..._meta import API_VTAG