Connect sign-up to Sendico Facts intake (#46)

backend/product/identity/model.go

@@ -0,0 +1,39 @@
+// Package identity owns the durable sign-up facts handoff, not KYC decisions.
+package identity
+
+import (
+	"time"
+
+	"git.sendico.io/tech/sxchnge/shared/database/record"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// Facts is a snapshot of local sign-up assertions. It never contains credentials.
+type Facts struct {
+	FullName    string `bson:"fullName"`
+	Email       string `bson:"email"`
+	CustomerRef string `bson:"customerRef"`
+}
+
+type Receipt struct {
+	SubmissionRef string    `bson:"submissionRef"`
+	SubjectRef    string    `bson:"subjectRef"`
+	AcceptedAt    time.Time `bson:"acceptedAt"`
+}
+
+// Binding uses the local customer ID as its primary key. Namespace is an opaque
+// adapter configuration fingerprint; no platform tenancy enters the customer model.
+type Binding struct {
+	storable.Base       `bson:",inline"`
+	Namespace           string    `bson:"namespace"`
+	RegistrationRequest string    `bson:"registrationRequest"`
+	Facts               Facts     `bson:"facts"`
+	Registering         bool      `bson:"registering"`
+	RegisteringAt       time.Time `bson:"registeringAt"`
+	SubjectRef          string    `bson:"subjectRef"`
+	Receipt             *Receipt  `bson:"receipt,omitempty"`
+}
+
+func (*Binding) Collection() string { return "signup_facts" }
+
+func sourceRef(id bson.ObjectID) string { return "sxchnge:signup:" + id.Hex() }