feat: add args for dfcache

[gaius-qi]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 106 lines in your changes missing coverage. Please review.

Project coverage is 34.05%. Comparing base (bb86c3b) to head (e985548).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dragonfly-client/src/bin/dfcache/export.rs	0.00%	25 Missing ⚠️
dragonfly-client/src/bin/dfcache/import.rs	0.00%	25 Missing ⚠️
dragonfly-client/src/bin/dfcache/remove.rs	0.00%	25 Missing ⚠️
dragonfly-client/src/bin/dfcache/stat.rs	0.00%	25 Missing ⚠️
dragonfly-client/src/bin/dfcache/main.rs	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #947      +/-   ##
==========================================
- Coverage   34.29%   34.05%   -0.25%     
==========================================
  Files          60       60              
  Lines        9327     9395      +68     
==========================================
  Hits         3199     3199              
- Misses       6128     6196      +68     

Files with missing lines	Coverage Δ
dragonfly-client/src/bin/dfcache/main.rs	0.00% <0.00%> (ø)
dragonfly-client/src/bin/dfcache/export.rs	0.00% <0.00%> (ø)
dragonfly-client/src/bin/dfcache/import.rs	0.00% <0.00%> (ø)
dragonfly-client/src/bin/dfcache/remove.rs	0.00% <0.00%> (ø)
dragonfly-client/src/bin/dfcache/stat.rs	0.00% <0.00%> (ø)

[chlins]

lgtm