fix: Fix processing for vector attributres table

internal/repository/postgres/dataset.go

@@ -211,6 +211,24 @@ func (r *DatasetRepository) SetGeoJSON(ctx context.Context, id uuid.UUID, geojso
 	return nil
 }
 
+// ClearGeometryAndGeoJSON nulls out a dataset's stored geometry and persisted
+// GeoJSON. Used before re-enqueuing a dataset's processing job so a stale
+// (possibly incorrect) geometry/GeoJSON is never served while the job is
+// pending; the async worker repopulates both once it completes.
+func (r *DatasetRepository) ClearGeometryAndGeoJSON(ctx context.Context, id uuid.UUID) error {
+	tag, err := r.pool.Exec(ctx,
+		`UPDATE datasets SET geometry = NULL, geojson = NULL, updated_at = now() WHERE id = $1`,
+		id,
+	)
+	if err != nil {
+		return mapError(err)
+	}
+	if tag.RowsAffected() == 0 {
+		return domain.ErrNotFound
+	}
+	return nil
+}
+
 // ReplaceObservations atomically replaces all observations for a dataset.
 func (r *DatasetRepository) ReplaceObservations(ctx context.Context, datasetID uuid.UUID, obs []domain.Observation) error {
 	tx, err := r.pool.Begin(ctx)