refac: runtime settings are read once at startup and passed in through the composition root; no handler, router or repository reads environment variables

test/hasher_test.go

@@ -218,6 +218,7 @@ func newHasherRouter(userRepo *mockUserRepo, hasher *stubHasher) *chi.Mux {
 		useCases.NewListUsersUseCase(userRepo),
 		useCases.NewCreateUserUseCase(userRepo, hasher),
 		useCases.NewAuthenticateUserUseCase(userRepo, hasher),
+		true,
 	)
 
 	r := chi.NewRouter()
@@ -237,6 +238,7 @@ func newRealHasherRouter(userRepo *mockUserRepo) *chi.Mux {
 		useCases.NewListUsersUseCase(userRepo),
 		useCases.NewCreateUserUseCase(userRepo, hasher),
 		useCases.NewAuthenticateUserUseCase(userRepo, hasher),
+		true,
 	)
 
 	r := chi.NewRouter()