feat(backend): add enforcementLevel into secret_approval_policies

backend/src/lib/types/index.ts

@@ -42,3 +42,8 @@ export type RequiredKeys<T> = {
 }[keyof T];
 
 export type PickRequired<T> = Pick<T, RequiredKeys<T>>;
+
+export enum EnforcementLevel {
+  Hard = "hard",
+  Soft = "soft"
+}