chore: git cache cleanup

backend/internal/notifications/engine.go

@@ -0,0 +1,23 @@
+package notifications
+
+import "context"
+
+const (
+	EngineLegacy   = "legacy"
+	EngineNotifyV1 = "notify_v1"
+)
+
+type DispatchRequest struct {
+	ProviderID string
+	Type       string
+	URL        string
+	Title      string
+	Message    string
+	Data       map[string]any
+}
+
+type DeliveryEngine interface {
+	Name() string
+	Send(ctx context.Context, req DispatchRequest) error
+	Test(ctx context.Context, req DispatchRequest) error
+}