Show run error on the run page in the UI

[r4victor]

Currently, the run error (termination reason) can be seen via the CLI with dstack ps -v or via the API:

 NAME                  BACKEND    INSTANCE           PRICE     STATUS      SUBMITTED     ERROR
 shaggy-husky-1        local      local              $0.0      failed      4 weeks ago   JOB_FAILED                    
                                                                                         (CONTAINER_EXITED_WITH_ERROR) 
 heavy-crab-1          local      local              $0.0      terminated  4 weeks ago   STOPPED_BY_USER               
 tame-fox-1            local      local              $0.0      terminated  4 weeks ago   STOPPED_BY_USER               
 ordinary-wombat-1     local      local              $0.0      done        4 weeks ago   ALL_JOBS_DONE

There should also be a way to see run errors via the UI as expected by users (e.g. #1654). Add the Error field next to Status on the run page. It should display run.termination_reason (run.jobs[0].job_submissions[-1].termination_reason). Here the CLI logic:

dstack/src/dstack/_internal/cli/utils/run.py

Lines 177 to 199 in 1537163

	def _get_run_error(run: Run) -> str:
	if run._run.termination_reason is None:
	return ""
	if len(run._run.jobs) > 1:
	return run._run.termination_reason.name
	run_job_termination_reason = _get_run_job_termination_reason(run)
	# For failed runs, also show termination reason to provide more context.
	# For other run statuses, the job termination reason will duplicate run status.
	if run_job_termination_reason is not None and run._run.termination_reason in [
	RunTerminationReason.JOB_FAILED,
	RunTerminationReason.SERVER_ERROR,
	RunTerminationReason.RETRY_LIMIT_EXCEEDED,
	]:
	return f"{run._run.termination_reason.name}\n({run_job_termination_reason.name})"
	return run._run.termination_reason.name
	def _get_run_job_termination_reason(run: Run) -> Optional[JobTerminationReason]:
	for job in run._run.jobs:
	if len(job.job_submissions) > 0:
	if job.job_submissions[-1].termination_reason is not None:
	return job.job_submissions[-1].termination_reason
	return None

[r4victor]

@olgenn, #1684 added "error" to the run response (/api/project/{project_name}/runs/get) so it can be shown as is the UI without extra work.