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/infrastructure/persistence/sqlite/user_repository_test.go

@@ -111,7 +111,6 @@ func TestUserRepositoryFindByID(t *testing.T) {
 	if found.Email != user.Email {
 		t.Errorf("Expected email %s, got %s", user.Email, found.Email)
 	}
-	}
 }
 
 func TestUserRepositoryFindByIDNotFound(t *testing.T) {
@@ -207,7 +206,6 @@ func TestUserRepositoryUpdate(t *testing.T) {
 	if found.Email != "updated@example.com" {
 		t.Errorf("Expected email updated@example.com, got %s", found.Email)
 	}
-	}
 }
 
 func TestUserRepositoryUpdateNotFound(t *testing.T) {