fix(coordinator): assign chunk task bug

[georgehao]

Purpose or design rationale of this PR

Describe your change. Make sure to answer these three questions: What does this PR do? Why does it do it? How does it do it?

PR title

Your PR title must follow conventional commits (as we are doing squash merge for each PR), so it must start with one of the following types:

• build: Changes that affect the build system or external dependencies (example scopes: yarn, eslint, typescript)
• ci: Changes to our CI configuration files and scripts (example scopes: vercel, github, cypress)
• docs: Documentation-only changes
• feat: A new feature
• fix: A bug fix
• perf: A code change that improves performance
• refactor: A code change that doesn't fix a bug, or add a feature, or improves performance
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
• test: Adding missing tests or correcting existing tests

Deployment tag versioning

Has tag in common/version.go been updated or have you added bump-version label to this PR?

• No, this PR doesn't involve a new deployment, git tag, docker image tag
• Yes

Breaking change label

Does this PR have the breaking-change label?

• No, this PR is not a breaking change
• Yes

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 51.61%. Comparing base (2ee1c89) to head (92e29c0).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
coordinator/internal/orm/chunk.go	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1515      +/-   ##
===========================================
- Coverage    51.61%   51.61%   -0.01%     
===========================================
  Files          155      155              
  Lines        12771    12689      -82     
===========================================
- Hits          6592     6549      -43     
+ Misses        5606     5579      -27     
+ Partials       573      561      -12     

Flag	Coverage Δ
coordinator	17.22% <0.00%> (ø)

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