feat: rebuild auth identity foundation flow

backend/ent/schema/identity_adoption_decision.go

@@ -0,0 +1,70 @@
+package schema
+
+import (
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/ent/schema/mixins"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/entsql"
+	"entgo.io/ent/schema"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+)
+
+// IdentityAdoptionDecision stores the one-time profile adoption choice captured during a pending auth flow.
+type IdentityAdoptionDecision struct {
+	ent.Schema
+}
+
+func (IdentityAdoptionDecision) Annotations() []schema.Annotation {
+	return []schema.Annotation{
+		entsql.Annotation{Table: "identity_adoption_decisions"},
+	}
+}
+
+func (IdentityAdoptionDecision) Mixin() []ent.Mixin {
+	return []ent.Mixin{
+		mixins.TimeMixin{},
+	}
+}
+
+func (IdentityAdoptionDecision) Fields() []ent.Field {
+	return []ent.Field{
+		field.Int64("pending_auth_session_id"),
+		field.Int64("identity_id").
+			Optional().
+			Nillable(),
+		field.Bool("adopt_display_name").
+			Default(false),
+		field.Bool("adopt_avatar").
+			Default(false),
+		field.Time("decided_at").
+			Immutable().
+			Default(time.Now).
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}),
+	}
+}
+
+func (IdentityAdoptionDecision) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.From("pending_auth_session", PendingAuthSession.Type).
+			Ref("adoption_decision").
+			Field("pending_auth_session_id").
+			Required().
+			Unique(),
+		edge.From("identity", AuthIdentity.Type).
+			Ref("adoption_decisions").
+			Field("identity_id").
+			Unique(),
+	}
+}
+
+func (IdentityAdoptionDecision) Indexes() []ent.Index {
+	return []ent.Index{
+		index.Fields("pending_auth_session_id").Unique(),
+		index.Fields("identity_id"),
+	}
+}