fix search and insured override

lib/policy_service/aggregates/life_policy_application.ex

@@ -33,5 +33,11 @@ defmodule PolicyService.Aggregates.LifePolicyApplication do
   def validate_details(_), do: {:error, :invalid_life_details}
 
   def validate_insured(%{"type" => "corporate"}), do: {:error, :life_insurance_requires_individual}
-  def validate_insured(insured), do: super(insured)
+
+  def validate_insured(%{"type" => "individual", "gender" => gender} = insured)
+      when is_binary(gender) and byte_size(gender) > 0 do
+    super(insured)
+  end
+
+  def validate_insured(%{"type" => "individual"}), do: {:error, :missing_gender}
 end