fix: restore sequence return values and correct invalid device naming

Author: BitForge95

tests/create_sequence_data.py

@@ -72,6 +72,8 @@ def _generate_sequence_data(
     with open(sequence_root / "meta.yml", "w") as f:
         yaml.safe_dump(meta, f)
 
+    return timestamps, data, shifts
+
 
 @contextmanager
 def create_sequence_data(

tests/test_experiment.py

@@ -337,12 +337,13 @@ def test_experiment_skips_invalid_devices(tmp_path, override_meta, caplog):
     end_val = start_val + duration_val
 
     # Generate random values for the invalid device as well
-    inv_start = np.random.lognormal(mean=0.0, sigma=1.0)
-    inv_end = inv_start + 10.0
+    start_nonval = np.random.lognormal(mean=0.0, sigma=1.0)
+    duration_nonval = np.random.lognormal(mean=0.0, sigma=1.0)
+    end_nonval = start_nonval + duration_nonval
 
     devices_kwargs = [
         {"start_time": start_val, "t_end": end_val},  # valid device
-        {"start_time": inv_start, "t_end": inv_end},  # invalid device
+        {"start_time": start_nonval, "t_end": end_nonval},  # invalid device
     ]
 
     with setup_test_experiment(