added k8s stub adapter for execution environment

internal/runner/nomad_manager.go

@@ -42,6 +42,7 @@ func NewNomadRunnerManager(apiClient nomad.ExecutorAPI, ctx context.Context) *No
 	return &NomadRunnerManager{NewAbstractManager(ctx), apiClient, storage.NewLocalStorage[*alertData]()}
 }
 
+// Claim returns a runner for the given environment. The runner will be marked as used for the given duration.
 func (m *NomadRunnerManager) Claim(environmentID dto.EnvironmentID, duration int) (Runner, error) {
 	environment, ok := m.GetEnvironment(environmentID)
 	if !ok {
@@ -185,6 +186,7 @@ func (m *NomadRunnerManager) checkPrewarmingPoolAlert(environment ExecutionEnvir
 
 func (m *NomadRunnerManager) loadEnvironment(environment ExecutionEnvironment) (used storage.Storage[Runner], err error) {
 	used = storage.NewLocalStorage[Runner]()
+
 	runnerJobs, err := m.apiClient.LoadRunnerJobs(environment.ID())
 	if err != nil {
 		return nil, fmt.Errorf("failed fetching the runner jobs: %w", err)