add invite to space feature

internal/model/invitation.go

@@ -0,0 +1,22 @@
+package model
+
+import "time"
+
+type InvitationStatus string
+
+const (
+	InvitationStatusPending  InvitationStatus = "pending"
+	InvitationStatusAccepted InvitationStatus = "accepted"
+	InvitationStatusExpired  InvitationStatus = "expired"
+)
+
+type SpaceInvitation struct {
+	Token     string           `db:"token"`
+	SpaceID   string           `db:"space_id"`
+	InviterID string           `db:"inviter_id"`
+	Email     string           `db:"email"`
+	Status    InvitationStatus `db:"status"`
+	ExpiresAt time.Time        `db:"expires_at"`
+	CreatedAt time.Time        `db:"created_at"`
+	UpdatedAt time.Time        `db:"updated_at"`
+}