Use real task status

[dispensable]

• show task running/no_status(-) etc status in task table

user often feels confused with the default task failed status (even when task is not scheduled to run)

[Copilot]

Pull Request Overview

This PR updates the task status display logic to show the real task status in the task table, addressing user confusion with the default failed status.

• Updates backend logic to compute and filter task statuses using a new task_status variable.
• Improves frontend display by using specific color-coded tags for success, failed, and other statuses.
• Upgrades node_modules caching in CI workflows to actions/cache v3.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
helpdesk/models/provider/airflow.py	Adjusts task status reporting and filtering to use a new status value
frontend/components/ResultHostTable.vue	Updates status tag rendering and logic to handle additional statuses
.github/workflows/test.yml	Updates caching version to actions/cache v3
.github/workflows/release.yml	Updates caching version to actions/cache v3

Comments suppressed due to low confidence (1)

helpdesk/models/provider/airflow.py:307

• The updated key format for tasks_result has changed from using a '->' separator to a space. Please verify that downstream code consuming these keys is updated accordingly to prevent potential issues.

tasks_result[f'{task_id} [{tries_time+1}/{task_tried_times}]'] = {