Default lower_bound active for mag scaler

Author: domfournier

simpeg_drivers-assets/uijson/magnetic_scalar_inversion.ui.json

@@ -410,7 +410,7 @@
         "property": "",
         "optional": true,
         "value": 0.0,
-        "enabled": false
+        "enabled": true
     },
     "upper_bound": {
         "association": [

simpeg_drivers/potential_fields/magnetic_scalar/params.py

@@ -118,3 +118,4 @@ class MagneticInversionOptions(BaseInversionOptions):
     inducing_field_strength: float | FloatData
     inducing_field_inclination: float | FloatData
     inducing_field_declination: float | FloatData
+    lower_bound: float | FloatData | None = 0.0

tests/run_tests/driver_mag_test.py

@@ -109,14 +109,14 @@ def test_susceptibility_run(
             z_norm=1.0,
             initial_beta_ratio=1e1,
             gradient_type="components",
-            lower_bound=0.0,
             tmi_channel=tmi,
             tmi_uncertainty=1.0,
             max_global_iterations=max_iterations,
             store_sensitivities="ram",
         )
         params.write_ui_json(path=tmp_path / "Inv_run.ui.json")
 
+    assert params.lower_bound == 0.0
     driver = MagneticInversionDriver.start(str(tmp_path / "Inv_run.ui.json"))
 
     with Workspace(driver.params.geoh5.h5file) as run_ws: