Improve range_field function in L2Circuits creation WF

gso/workflows/l2_circuit/create_layer_2_circuit.py

@@ -48,7 +48,7 @@ def initial_input_generator(product_name: str) -> FormGenerator:
         )
         vlan_id: VLAN_ID
 
-    def vlan_range_field(*, is_tagged: bool) -> Any:
+    def _vlan_range_field(*, is_tagged: bool) -> VLAN_ID | ReadOnlyField:
         """Return the appropriate field type based on whether the circuit is tagged."""
         return VLAN_ID if is_tagged else ReadOnlyField(None, default_type=int)
 
@@ -56,10 +56,10 @@ def initial_input_generator(product_name: str) -> FormGenerator:
         model_config = ConfigDict(title=f"{product_name} - Configure Edge Ports")
 
         vlan_range_label: Label = Field("Please set a VLAN range, bounds including.", exclude=True)
-        vlan_range_lower_bound: vlan_range_field(
+        vlan_range_lower_bound: _vlan_range_field(
             is_tagged=initial_user_input.layer_2_circuit_type == Layer2CircuitType.TAGGED
         )
-        vlan_range_upper_bound: vlan_range_field(
+        vlan_range_upper_bound: _vlan_range_field(
             is_tagged=initial_user_input.layer_2_circuit_type == Layer2CircuitType.TAGGED
         )
         vlan_divider: Divider = Field(None, exclude=True)