feat: add comprehensive database models and type definitions

- Define Certificate model with full X.509 attributes
- Add CertificateAuthority model for CA management
- Implement CertificateRequest model for CSR handling
- Add CertificateRevocationList model for CRL support
- Define User and Organization models for access control
- Include comprehensive certificate type definitions (web, client, email, etc.)
- Add status enums for certificates, requests, and organizations
- Configure GORM relationships and constraints

models/organization.go

@@ -0,0 +1,58 @@
+package models
+
+import (
+	"fmt"
+	"time"
+
+	"git.secnex.io/secnex/certman/utils"
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+type Organization struct {
+	ID          uuid.UUID          `json:"id" gorm:"type:uuid;primary_key;default:gen_random_uuid()"`
+	Name        string             `json:"name" gorm:"not null;unique"`
+	Description string             `json:"description"`
+	Address     string             `json:"address"`
+	City        string             `json:"city" gorm:"not null"`
+	State       string             `json:"state"`
+	Country     string             `json:"country" gorm:"not null"`
+	PostalCode  string             `json:"postal_code"`
+	Phone       string             `json:"phone"`
+	Email       string             `json:"email" gorm:"not null;unique"`
+	Website     string             `json:"website" gorm:"not null;unique"`
+	Logo        string             `json:"logo"`
+	Status      OrganizationStatus `json:"status" gorm:"not null;default:'active'"`
+	CreatedBy   uuid.UUID          `json:"created_by" gorm:"type:uuid;not null"`
+	UpdatedBy   uuid.UUID          `json:"updated_by" gorm:"type:uuid;not null"`
+	CreatedAt   time.Time          `json:"created_at" gorm:"autoCreateTime"`
+	UpdatedAt   time.Time          `json:"updated_at" gorm:"autoUpdateTime"`
+	DeletedAt   gorm.DeletedAt     `json:"deleted_at" gorm:"index"`
+
+	CertificateAuthorities []*CertificateAuthority `gorm:"foreignKey:OrganizationID"`
+
+	UserCreatedBy User `gorm:"foreignKey:CreatedBy"`
+	UserUpdatedBy User `gorm:"foreignKey:UpdatedBy"`
+
+	// Members of organizations
+	Members []*User `gorm:"many2many:organization_members;"`
+}
+
+func (o *Organization) TableName() string {
+	return "organizations"
+}
+
+func (o *Organization) BeforeCreate(tx *gorm.DB) (err error) {
+	o.ID = uuid.New()
+	// Check if the email address matches the email regex and the domain is the same as the website
+	if !utils.IsEmailValid(o.Email) {
+		return fmt.Errorf("invalid email address")
+	}
+	if !utils.IsDomainValid(o.Website) {
+		return fmt.Errorf("invalid website domain")
+	}
+	if !utils.IsEmailDomainValid(o.Email, o.Website) {
+		return fmt.Errorf("email and website domains do not match")
+	}
+	return
+}