feat: Refactor User entity and datasource to use email and password hashing with salt

backend/internal/interfaces/http/dto/auth_dto.go

@@ -0,0 +1,6 @@
+package dto
+
+type AuthDto struct {
+	Email    string `json:"email"`
+	Password string `json:"password"`
+}

backend/internal/interfaces/http/dto/user_dto.go

@@ -11,16 +11,15 @@ type UserDto struct {
 	CreatedAt    time.Time `json:"createdAt"`
 	UpdatedAt    time.Time `json:"updatedAt"`
 	LastEditorID ulid.ULID `json:"lastEditorID"`
-	Username     string    `json:"username"`
-	Password     string    `json:"password"` // Note: In a real application, you would NEVER send the password in a DTO. This is just for demonstration.
+	Email        string    `json:"email"`
 	Role         string    `json:"role"`
 	CompanyID    int       `json:"companyId"`
 	HourlyRate   float64   `json:"hourlyRate"`
 }
 
 type UserCreateDto struct {
-	Username   string  `json:"username"`
-	Password   string  `json:"password"` // Note: In a real application, you would NEVER send the password in a DTO. This is just for demonstration.
+	Email      string  `json:"email"`
+	Password   string  `json:"password"`
 	Role       string  `json:"role"`
 	CompanyID  int     `json:"companyId"`
 	HourlyRate float64 `json:"hourlyRate"`
@@ -31,8 +30,8 @@ type UserUpdateDto struct {
 	CreatedAt    *time.Time `json:"createdAt"`
 	UpdatedAt    *time.Time `json:"updatedAt"`
 	LastEditorID *ulid.ULID `json:"lastEditorID"`
-	Username     *string    `json:"username"`
-	Password     *string    `json:"password"` // Note: In a real application, you would NEVER send the password in a DTO. This is just for demonstration.
+	Email        *string    `json:"email"`
+	Password     *string    `json:"password"`
 	Role         *string    `json:"role"`
 	CompanyID    *int       `json:"companyId"`
 	HourlyRate   *float64   `json:"hourlyRate"`