feat: instance lock and purge fields for HQ disputes

models/instance_test.go

@@ -0,0 +1,40 @@
+package models
+
+import (
+	"testing"
+	"time"
+
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+func TestInstanceLockFieldsBSON(t *testing.T) {
+	at := time.Date(2026, 9, 10, 10, 0, 0, 0, time.UTC)
+
+	raw, err := bson.Marshal(Instance{InstanceID: "i1", LockedAt: &at, PurgeAfter: &at})
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+	var set bson.M
+	if err := bson.Unmarshal(raw, &set); err != nil {
+		t.Fatalf("unmarshal: %v", err)
+	}
+	for _, k := range []string{"locked_at", "purge_after"} {
+		if _, ok := set[k]; !ok {
+			t.Errorf("%s missing from %v", k, set)
+		}
+	}
+
+	raw, err = bson.Marshal(Instance{InstanceID: "i1"})
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+	var unset bson.M
+	if err := bson.Unmarshal(raw, &unset); err != nil {
+		t.Fatalf("unmarshal: %v", err)
+	}
+	for _, k := range []string{"locked_at", "purge_after"} {
+		if _, ok := unset[k]; ok {
+			t.Errorf("%s written for an unlocked instance: %v", k, unset)
+		}
+	}
+}