Add workspace database schema (mlflow#18909)

Signed-off-by: mprahl <mprahl@users.noreply.github.com>

Author: mprahl

docs/api_reference/api_inventory.txt

@@ -528,6 +528,7 @@ mlflow.entities.WebhookStatus.to_proto
 mlflow.entities.WebhookTestResult
 mlflow.entities.WebhookTestResult.from_proto
 mlflow.entities.WebhookTestResult.to_proto
+mlflow.entities.Workspace
 mlflow.entities.assessment.Assessment
 mlflow.entities.assessment.Expectation
 mlflow.entities.assessment.Feedback
@@ -627,6 +628,7 @@ mlflow.entities.webhook.Webhook
 mlflow.entities.webhook.WebhookEvent
 mlflow.entities.webhook.WebhookStatus
 mlflow.entities.webhook.WebhookTestResult
+mlflow.entities.workspace.Workspace
 mlflow.evaluate
 mlflow.exceptions.get_error_code
 mlflow.finalize_logged_model

mlflow/entities/__init__.py

@@ -62,6 +62,7 @@
     WebhookStatus,
     WebhookTestResult,
 )
+from mlflow.entities.workspace import Workspace
 
 __all__ = [
     "Experiment",
@@ -125,6 +126,7 @@
     "WebhookEvent",
     "WebhookStatus",
     "WebhookTestResult",
+    "Workspace",
 ]
 
 

mlflow/entities/workspace.py

@@ -0,0 +1,13 @@
+"""Workspace entity shared between server and stores."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True, slots=True)
+class Workspace:
+    """Minimal metadata describing a workspace."""
+
+    name: str
+    description: str | None = None