feat: rename digest func and add new digest func

[gaius-qi]

Signed-off-by: Gaius gaius.qi@gmail.com

Description

• Rename digest func and add new digest func.

Related Issue

#1249

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-commenter]

Codecov Report

Merging #1405 (731e52a) into main (01e57e3) will increase coverage by 0.05%.
The diff coverage is 41.17%.

@@            Coverage Diff             @@
##             main    #1405      +/-   ##
==========================================
+ Coverage   45.03%   45.09%   +0.05%     
==========================================
  Files         110      110              
  Lines       10018    10022       +4     
==========================================
+ Hits         4512     4519       +7     
+ Misses       5045     5035      -10     
- Partials      461      468       +7     

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	45.09% <41.17%> (+0.05%)	⬆️

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

Impacted Files	Coverage Δ
pkg/digest/digest.go	54.90% <20.00%> (-4.68%)	⬇️
client/daemon/storage/local_storage.go	30.33% <50.00%> (ø)
client/daemon/storage/local_storage_subtask.go	27.72% <50.00%> (ø)
client/daemon/peer/peertask_conductor.go	57.14% <100.00%> (-1.41%)	⬇️
pkg/idgen/task_id.go	91.30% <100.00%> (ø)
...ent/daemon/peer/peertask_piecetask_synchronizer.go	46.75% <0.00%> (-0.87%)	⬇️
client/daemon/peer/peertask_piecetask_poller.go	47.10% <0.00%> (+16.66%)	⬆️

[hyy0322]

lgtm