feat: support time_zone for user registration context

authsession/internal/adapters/userservice/stub_directory.go

@@ -69,13 +69,13 @@ func (d *StubDirectory) ExistsByUserID(ctx context.Context, userID common.UserID
 	return ok, nil
 }
 
-// EnsureUserByEmail returns an existing user for email, creates a new user
-// when registration is allowed, or reports a blocked outcome.
-func (d *StubDirectory) EnsureUserByEmail(ctx context.Context, email common.Email) (ports.EnsureUserResult, error) {
+// EnsureUserByEmail returns an existing user for input.Email, creates a new
+// user when registration is allowed, or reports a blocked outcome.
+func (d *StubDirectory) EnsureUserByEmail(ctx context.Context, input ports.EnsureUserInput) (ports.EnsureUserResult, error) {
 	if err := validateContext(ctx, "ensure user by email"); err != nil {
 		return ports.EnsureUserResult{}, err
 	}
-	if err := email.Validate(); err != nil {
+	if err := input.Validate(); err != nil {
 		return ports.EnsureUserResult{}, fmt.Errorf("ensure user by email: %w", err)
 	}
 
@@ -84,7 +84,7 @@ func (d *StubDirectory) EnsureUserByEmail(ctx context.Context, email common.Emai
 
 	d.ensureMapsLocked()
 
-	stored, ok := d.byEmail[email]
+	stored, ok := d.byEmail[input.Email]
 	if ok {
 		if !stored.blockReasonCode.IsZero() {
 			result := ports.EnsureUserResult{
@@ -113,8 +113,8 @@ func (d *StubDirectory) EnsureUserByEmail(ctx context.Context, email common.Emai
 	if err != nil {
 		return ports.EnsureUserResult{}, fmt.Errorf("ensure user by email: %w", err)
 	}
-	d.byEmail[email] = entry{userID: userID}
-	d.emailByUserID[userID] = email
+	d.byEmail[input.Email] = entry{userID: userID}
+	d.emailByUserID[userID] = input.Email
 
 	result := ports.EnsureUserResult{
 		Outcome: ports.EnsureUserOutcomeCreated,