fix(observatory): preserve camera across follow transitions

tests/test_rrd_export.py

@@ -627,8 +627,9 @@ def test_recorded_blueprint_updates_reuse_source_store_and_opt_in_to_activation(
     assert eye_control_updates == [True, False, True, False, True]
     # Reactivating a blueprint clone is required for visible layer changes, but
     # those changes must not write position/look-target/eye-up and reset the
-    # operator's camera. Only the follow transition writes a spatial preset.
-    assert explicit_presets == [False, False, True, False, False]
+    # operator's camera. Follow only changes tracking; it must not write the
+    # startup eye. 3D/plan remains the explicit spatial preset transition.
+    assert explicit_presets == [False, False, False, False, False]
     assert [activation[1:] for activation in activations] == [
         (True, False),
         (reactivate_updates, False),