[FIX] Use deepcopy for options and add example.mle test file (#16)

# [BUG] Fix dual contouring deepcopy and remove redundant code

- Replace `copy.copy` with `copy.deepcopy` in `multi_scalar_dual_contouring.py` to ensure proper isolation of options when modifying evaluation parameters
- Remove redundant case statements in `raw_arrays_solution.py` that were handling unneeded block solution types
- Add example MLE file for testing server functionality

## [BUG] Dual contouring was switching compute grads on for the original geomodel object

Author: Leguark

gempy_engine/API/dual_contouring/multi_scalar_dual_contouring.py

@@ -31,7 +31,7 @@ def dual_contouring_multi_scalar(data_descriptor: InputDataDescriptor, interpola
     octree_leaves = octree_list[-1]
     all_meshes: List[DualContouringMesh] = []
 
-    dual_contouring_options = copy.copy(options)
+    dual_contouring_options = copy.deepcopy(options)
     dual_contouring_options.evaluation_options.compute_scalar_gradient = True
 
     if options.debug_water_tight:

gempy_engine/core/data/raw_arrays_solution.py

@@ -82,11 +82,6 @@ def from_gempy_engine_solutions(cls, octrees_output: list[OctreeLevel], meshes:
             case cls.BlockSolutionType.DENSE_GRID:
                 _fill_block_solutions_with_dense_grid(stacks_output, raw_arrays_solution)
                 raw_arrays_solution.dense_ids = BackendTensor.t.to_numpy(collapsed_output.ids_block_dense_grid)
-            case cls.BlockSolutionType.NONE:
-                return None
-            case _:
-                raise ValueError(f"Block solution type {block_solution_type} not recognized")
-        
 
         # Endregion
 

tests/test_common/test_modules/test_dual.py

@@ -394,8 +394,6 @@ def test_find_edges_intersection_step_by_step(simple_model, simple_grid_3d_octre
                       xyz_on_edge, gradients, a, b, v_pro, np.array(v_mesh), indices=None,
                       plot_label=False, plot_marching_cubes=False)
 
-    return xyz_on_edge, gradients
-
 
 @pytest.mark.skipif(BackendTensor.engine_backend != AvailableBackends.numpy, reason="Only numpy supported")
 def test_find_edges_intersection_pro(simple_model, simple_grid_3d_octree):
@@ -503,8 +501,6 @@ def test_find_edges_intersection_pro(simple_model, simple_grid_3d_octree):
                       v_pro=v_pro, indices=indices, plot_marching_cubes=True
                       )
 
-    return xyz_on_edge, gradients
-
 
 @pytest.mark.skipif(BackendTensor.engine_backend != AvailableBackends.numpy, reason="Only numpy supported")
 def test_find_edges_intersection_bias_on_center_of_the_cell(simple_model, simple_grid_3d_octree):
@@ -608,8 +604,6 @@ def test_find_edges_intersection_bias_on_center_of_the_cell(simple_model, simple
                       v_pro=v_pro, indices=indices, plot_marching_cubes=True
                       )
 
-    return xyz_on_edge, gradients
-
 
 # * ======================= Private functions =======================