feat: add temporal Mol explorer

backend/app/services/demo_workflow_service.py

@@ -10,7 +10,7 @@ from uuid import UUID, uuid4
 from geoalchemy2.shape import from_shape
 from sqlalchemy.orm import Session
 
-from app.models import Area, Dataset, Metric, Project, QualityCheck
+from app.models import Area, Dataset, DatasetVersion, Metric, Project, QualityCheck
 from app.schemas.demo import DemoWorkflowResponse
 from app.services.geojson_service import parse_geojson_payload
 from app.services.qa_service import QaService
@@ -29,6 +29,19 @@ class DemoWorkflowService:
     RASTER_FILENAME = "demo_context_raster.tif"
     EXPECTED_METRICS_FILENAME = "expected_qa_metrics.json"
 
+    @staticmethod
+    def _add_initial_version(db: Session, dataset: Dataset) -> None:
+        db.add(
+            DatasetVersion(
+                dataset_id=dataset.id,
+                version=1,
+                storage_path=dataset.storage_path,
+                checksum_sha256=dataset.checksum_sha256,
+                source_metadata=dataset.source_metadata,
+                provenance_metadata=dataset.provenance_metadata,
+            )
+        )
+
     @staticmethod
     def _repo_root() -> Path:
         return Path(__file__).resolve().parents[3]
@@ -213,6 +226,7 @@ class DemoWorkflowService:
             status="ready",
         )
         db.add(dataset)
+        DemoWorkflowService._add_initial_version(db, dataset)
         db.commit()
         db.refresh(dataset)
         VectorFeatureService.persist_geojson_features(
@@ -297,6 +311,7 @@ class DemoWorkflowService:
             status="ready",
         )
         db.add(dataset)
+        DemoWorkflowService._add_initial_version(db, dataset)
         db.commit()
         db.refresh(dataset)
         return dataset