Add tests for RequestPasswordResetHandler and fix test compilation errors

- Add comprehensive tests for RequestPasswordResetHandler covering success and error cases
- Fix timezone-related test failures after removal of User.Timezone field:
  - Remove Timezone assertions from login_user_test.go
  - Remove Timezone field from RegisterRequest in integration tests
  - Update ValidateRegistration test cases (no longer validates timezone)
  - Update migrations_test to check current user table schema
- Fix syntax errors in user_repository_test.go (duplicate closing braces on lines 114 and 210)

internal/application/queries/login_user_test.go

@@ -90,10 +90,6 @@ func TestLoginUserHandler_Success(t *testing.T) {
 	if result.Email != "test@example.com" {
 		t.Errorf("Email = %v, want %v", result.Email, "test@example.com")
 	}
-
-	if result.Timezone != "UTC" {
-		t.Errorf("Timezone = %v, want %v", result.Timezone, "UTC")
-	}
 }
 
 func TestLoginUserHandler_EmptyEmail(t *testing.T) {