feat: optimize GetTaskJob and DeleteTaskJob

[gaius-qi]

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]

Codecov Report

Attention: Patch coverage is 23.52941% with 39 lines in your changes missing coverage. Please review.

Project coverage is 52.49%. Comparing base (5547307) to head (1051baf).
Report is 6 commits behind head on main.

Files	Patch %	Lines
manager/job/task.go	0.00%	18 Missing ⚠️
manager/job/job.go	0.00%	8 Missing ⚠️
scheduler/resource/task.go	0.00%	7 Missing ⚠️
manager/job/preheat.go	0.00%	3 Missing ⚠️
client/daemon/peer/peertask_reuse.go	50.00%	0 Missing and 2 partials ⚠️
client/daemon/transport/transport.go	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3434      +/-   ##
==========================================
- Coverage   52.56%   52.49%   -0.07%     
==========================================
  Files         194      194              
  Lines       20578    20589      +11     
==========================================
- Hits        10816    10808       -8     
- Misses       8952     8967      +15     
- Partials      810      814       +4     

Flag	Coverage Δ
unittests	52.49% <23.52%> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
manager/config/config.go	96.15% <ø> (-0.06%)	⬇️
manager/handlers/job.go	63.85% <100.00%> (ø)
pkg/idgen/task_id.go	82.35% <100.00%> (ø)
client/daemon/transport/transport.go	38.25% <66.66%> (+0.32%)	⬆️
client/daemon/peer/peertask_reuse.go	63.25% <50.00%> (-0.70%)	⬇️
manager/job/preheat.go	51.70% <0.00%> (-0.49%)	⬇️
scheduler/resource/task.go	77.43% <0.00%> (-1.05%)	⬇️
manager/job/job.go	0.00% <0.00%> (ø)
manager/job/task.go	0.00% <0.00%> (ø)

... and 4 files with indirect coverage changes