feat: add chunk/batch get_task index

[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?

add the missing index of chunk/batch get_task

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]

Codecov Report

Merging #976 (46639a5) into develop (c551609) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #976   +/-   ##
========================================
  Coverage    48.18%   48.18%           
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  Files          100      100           
  Lines        10579    10579           
========================================
  Hits          5098     5098           
  Misses        5060     5060           
  Partials       421      421           

Flag	Coverage Δ
database	42.85% <ø> (ø)
rollup	66.54% <ø> (ø)

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