Include user of latest run in pipeline response (#3262)

* Include user of latest run in pipeline response

* Linting

* Fix optional check

src/zenml/models/v2/core/pipeline.py

@@ -44,7 +44,7 @@
 from zenml.models.v2.core.tag import TagResponse
 
 if TYPE_CHECKING:
-    from zenml.models.v2.core.pipeline_run import PipelineRunResponse
+    from zenml.models import PipelineRunResponse, UserResponse
     from zenml.zen_stores.schemas import BaseSchema
 
     AnySchema = TypeVar("AnySchema", bound=BaseSchema)
@@ -119,6 +119,10 @@ class PipelineResponseMetadata(WorkspaceScopedResponseMetadata):
 class PipelineResponseResources(WorkspaceScopedResponseResources):
     """Class for all resource models associated with the pipeline entity."""
 
+    latest_run_user: Optional["UserResponse"] = Field(
+        default=None,
+        title="The user that created the latest run of this pipeline.",
+    )
     tags: List[TagResponse] = Field(
         title="Tags associated with the pipeline.",
     )

src/zenml/zen_stores/schemas/pipeline_schemas.py

@@ -156,7 +156,12 @@ def to_model(
 
         resources = None
         if include_resources:
+            latest_run_user = self.runs[-1].user if self.runs else None
+
             resources = PipelineResponseResources(
+                latest_run_user=latest_run_user.to_model()
+                if latest_run_user
+                else None,
                 tags=[t.tag.to_model() for t in self.tags],
             )