fix: standardize on fully qualified snapshot_id and decouple protobufs from restic package

internal/api/api.go

@@ -53,7 +53,6 @@ func loggingFunc(l *zap.Logger) logging.Logger {
 	})
 }
 
-
 func serveGRPC(ctx context.Context, socket string, server *Server) error {
 	lis, err := net.Listen("unix", socket)
 	if err != nil {
@@ -110,4 +109,4 @@ func ServeAPI(ctx context.Context, server *Server, mux *http.ServeMux) error {
 	apiMux := runtime.NewServeMux()
 	mux.Handle("/api/", http.StripPrefix("/api", apiMux))
 	return serveHTTPHandlers(ctx, server, apiMux)
-}
+}