feat: pex support parent task

[jim3ma]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation Update (if none of the other choices apply)

Checklist

• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 4.87805% with 39 lines in your changes are missing coverage. Please review.

Project coverage is 52.62%. Comparing base (3ddf37a) to head (ba71ec4).

Additional details and impacted files

[](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3274?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss) ```diff @@ Coverage Diff @@ ## main #3274 +/- ## ========================================== - Coverage 52.68% 52.62% -0.06% ========================================== Files 192 192 Lines 20397 20422 +25 ========================================== + Hits 10747 10748 +1 - Misses 8843 8869 +26 + Partials 807 805 -2 ``` | [Flag](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3274/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3274/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss) | `52.62% <4.87%> (-0.06%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3274?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss) | Coverage Δ | | |---|---|---| | [client/daemon/peer/peertask\_stream.go](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3274?src=pr&el=tree&filepath=client%2Fdaemon%2Fpeer%2Fpeertask_stream.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss#diff-Y2xpZW50L2RhZW1vbi9wZWVyL3BlZXJ0YXNrX3N0cmVhbS5nbw==) | `61.13% <0.00%> (-0.88%)` | :arrow_down: | | [client/daemon/transport/transport.go](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3274?src=pr&el=tree&filepath=client%2Fdaemon%2Ftransport%2Ftransport.go&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss#diff-Y2xpZW50L2RhZW1vbi90cmFuc3BvcnQvdHJhbnNwb3J0Lmdv) | `35.46% <5.40%> (-2.48%)` | :arrow_down: | ... and [2 files with indirect coverage changes](https://app.codecov.io/gh/dragonflyoss/Dragonfly2/pull/3274/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=dragonflyoss)