feat: add is_default to SchedulerCluster table

[gaius-qi]

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

Description

• Add is_default to SchedulerCluster table

Related Issue

Motivation and Context

Fixes #456

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:

• Code compiles correctly.
• My code follows the code style of this project.
• 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.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #458 (4719bc0) into main (b7b4558) will decrease coverage by 0.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #458      +/-   ##
==========================================
- Coverage   36.31%   36.18%   -0.14%     
==========================================
  Files          85       85              
  Lines        6727     6727              
==========================================
- Hits         2443     2434       -9     
- Misses       3933     3943      +10     
+ Partials      351      350       -1     

Flag	Coverage Δ
e2etests	∅ <ø> (∅)
unittests	36.18% <ø> (-0.14%)	⬇️

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

Impacted Files	Coverage Δ
client/daemon/peer/peertask_stream.go	54.77% <0.00%> (-2.21%)	⬇️
client/daemon/peer/peertask_base.go	32.21% <0.00%> (-0.72%)	⬇️