refactor(db): shim automations.search_space_id to physical workspace_id

Phase 1 (rename DB) commit 1c: attribute->physical column shim on the
automations satellite model. ORM attribute and relationship unchanged.

surfsense_backend/app/automations/persistence/models/automation.py

@@ -25,6 +25,7 @@ class Automation(BaseModel, TimestampMixin):
     __tablename__ = "automations"
 
     search_space_id = Column(
+        "workspace_id",
         Integer,
         ForeignKey("searchspaces.id", ondelete="CASCADE"),
         nullable=False,