feat: add peer manager for persistent cache task

[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 0.94340% with 210 lines in your changes missing coverage. Please review.

Project coverage is 35.67%. Comparing base (395fc6c) to head (f756167).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
scheduler/resource/persistentcache/peer_manager.go	0.00%	136 Missing ⚠️
scheduler/resource/persistentcache/host_manager.go	0.00%	48 Missing ⚠️
scheduler/resource/persistentcache/task_manager.go	0.00%	18 Missing ⚠️
pkg/redis/redis.go	0.00%	4 Missing ⚠️
internal/dflog/logger.go	50.00%	2 Missing ⚠️
scheduler/resource/persistentcache/peer.go	0.00%	1 Missing ⚠️
scheduler/resource/persistentcache/task.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3592      +/-   ##
==========================================
- Coverage   35.83%   35.67%   -0.16%     
==========================================
  Files         335      336       +1     
  Lines       36962    37106     +144     
==========================================
- Hits        13245    13238       -7     
- Misses      22882    23031     +149     
- Partials      835      837       +2     

Flag	Coverage Δ
unittests	35.67% <0.94%> (-0.16%)	⬇️

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

Files with missing lines	Coverage Δ
scheduler/resource/persistentcache/peer.go	0.00% <0.00%> (ø)
scheduler/resource/persistentcache/task.go	0.00% <0.00%> (ø)
internal/dflog/logger.go	58.09% <50.00%> (ø)
pkg/redis/redis.go	40.74% <0.00%> (-3.26%)	⬇️
scheduler/resource/persistentcache/task_manager.go	0.00% <0.00%> (ø)
scheduler/resource/persistentcache/host_manager.go	0.00% <0.00%> (ø)
scheduler/resource/persistentcache/peer_manager.go	0.00% <0.00%> (ø)

... and 3 files with indirect coverage changes

[fcgxz2003]

lgtm