feat: remove bcrypt and use a precompute hash

cmd/goyco/commands/parallel_processor.go

@@ -9,7 +9,6 @@ import (
 	"sync"
 	"time"
 
-	"golang.org/x/crypto/bcrypt"
 	"goyco/internal/database"
 	"goyco/internal/repositories"
 )
@@ -17,6 +16,7 @@ import (
 type ParallelProcessor struct {
 	maxWorkers   int
 	timeout      time.Duration
+	passwordHash string
 }
 
 func NewParallelProcessor() *ParallelProcessor {
@@ -28,6 +28,10 @@ func NewParallelProcessor() *ParallelProcessor {
 	}
 }
 
+func (p *ParallelProcessor) SetPasswordHash(hash string) {
+	p.passwordHash = hash
+}
+
 func (p *ParallelProcessor) CreateUsersInParallel(userRepo repositories.UserRepository, count int, progress *ProgressIndicator) ([]database.User, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), p.timeout)
 	defer cancel()
@@ -292,18 +296,12 @@ func generateRandomIdentifier() string {
 }
 
 func (p *ParallelProcessor) createSingleUser(userRepo repositories.UserRepository, index int) (database.User, error) {
-	password := "password123"
 	randomID := generateRandomIdentifier()
 	username := fmt.Sprintf("user_%s", randomID)
 	email := fmt.Sprintf("user_%s@goyco.local", randomID)
 
-	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
-	if err != nil {
-		return database.User{}, fmt.Errorf("hash password: %w", err)
-	}
-
 	const maxRetries = 10
-	for attempt := 0; attempt < maxRetries; attempt++ {
+	for range maxRetries {
 		user, err := userRepo.GetByEmail(email)
 		if err == nil {
 			return *user, nil
@@ -312,7 +310,7 @@ func (p *ParallelProcessor) createSingleUser(userRepo repositories.UserRepositor
 		user = &database.User{
 			Username:      username,
 			Email:         email,
-			Password:      string(hashedPassword),
+			Password:      p.passwordHash,
 			EmailVerified: true,
 		}
 
@@ -379,7 +377,7 @@ func (p *ParallelProcessor) createSinglePost(postRepo repositories.PostRepositor
 	content := fmt.Sprintf("Autogenerated seed post #%d\n\nThis is sample content for testing purposes. The post discusses %s and provides valuable insights.", index, title)
 
 	const maxRetries = 10
-	for attempt := 0; attempt < maxRetries; attempt++ {
+	for range maxRetries {
 		post := &database.Post{
 			Title:     title,
 			URL:       url,