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/cert.go

@@ -0,0 +1,57 @@
+package models
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+// Certificate represents a digital certificate
+type Certificate struct {
+	ID                              uuid.UUID         `json:"id" gorm:"type:uuid;primary_key;default:gen_random_uuid()"`
+	Name                            string            `json:"name" gorm:"not null"`
+	Description                     string            `json:"description"`
+	SerialNumber                    string            `json:"serial_number" gorm:"not null;unique"`
+	AttributeCommonName             string            `json:"attribute_common_name" gorm:"not null"`
+	AttributeSubjectAlternativeName string            `json:"attribute_subject_alternative_name"` // JSON array of SANs
+	AttributeOrganization           string            `json:"attribute_organization" gorm:"not null"`
+	AttributeOrganizationUnit       string            `json:"attribute_organization_unit" gorm:"not null"`
+	AttributeCountry                string            `json:"attribute_country" gorm:"not null"`
+	AttributeState                  string            `json:"attribute_state" gorm:"not null"`
+	AttributeLocality               string            `json:"attribute_locality" gorm:"not null"`
+	AttributeStreet                 string            `json:"attribute_street" gorm:"not null"`
+	AttributeEmail                  string            `json:"attribute_email" gorm:"not null"`
+	AttributeAddress                string            `json:"attribute_address" gorm:"not null"`
+	AttributePostalCode             string            `json:"attribute_postal_code" gorm:"not null"`
+	AttributeNotBefore              time.Time         `json:"attribute_not_before" gorm:"not null"`
+	AttributeNotAfter               time.Time         `json:"attribute_not_after" gorm:"not null"`
+	Type                            CertificateType   `json:"type" gorm:"not null"`
+	Status                          CertificateStatus `json:"status" gorm:"not null;default:'pending'"`
+	CertificateAuthorityID          uuid.UUID         `json:"ca_id" gorm:"type:uuid;not null"`
+	RequestID                       *uuid.UUID        `json:"request_id" gorm:"type:uuid"`
+	FileID                          string            `json:"file_id" gorm:"not null"`
+	PrivateKeyID                    string            `json:"private_key_id" gorm:"not null"`
+	Generated                       bool              `json:"generated" gorm:"not null;default:false"`
+	GeneratedAt                     *time.Time        `json:"generated_at"`
+	RevocationReason                string            `json:"revocation_reason"`
+	RevokedAt                       *time.Time        `json:"revoked_at"`
+	CreatedAt                       time.Time         `json:"created_at" gorm:"autoCreateTime"`
+	UpdatedAt                       time.Time         `json:"updated_at" gorm:"autoUpdateTime"`
+	DeletedAt                       gorm.DeletedAt    `json:"deleted_at" gorm:"index"`
+
+	// Relationships
+	CertificateAuthority *CertificateAuthority `json:"certificate_authority" gorm:"foreignKey:CertificateAuthorityID"`
+	Request              *CertificateRequest   `json:"request" gorm:"foreignKey:RequestID"`
+}
+
+// TableName returns the table name for Certificate
+func (c *Certificate) TableName() string {
+	return "certificates"
+}
+
+// BeforeCreate generates a new UUID before creating the record
+func (c *Certificate) BeforeCreate(tx *gorm.DB) (err error) {
+	c.ID = uuid.New()
+	return
+}