feat(dashboard-srv): support list sources

[xxchan]

Signed-off-by: xxchan [email protected]

I hereby agree to the terms of the Singularity Data, Inc. Contributor License Agreement.

What's changed and what's your intention?

Add new APIs to get more data out of the meta node.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• All checks passed in ./risedev check (or alias, ./risedev c)

Documentation

If your pull request contains user-facing changes, please specify the types of the changes, and create a release note. Otherwise, please feel free to remove this section.

Types of user-facing changes

Please keep the types that apply to your changes, and remove those that do not apply.

• Installation and deployment
• Connector (sources & sinks)
• SQL commands, functions, and operators
• RisingWave cluster configuration changes
• Other (please specify in the release note below)

Release note

Please create a release note for your changes. In the release note, focus on the impact on users, and mention the environment or conditions where the impact may occur.

Refer to a related PR or issue link (optional)

ref #4137

[codecov]

Codecov Report

Merging #5098 (f12fc67) into main (e1cacf0) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #5098      +/-   ##
==========================================
- Coverage   74.24%   74.21%   -0.04%     
==========================================
  Files         882      882              
  Lines      134937   134837     -100     
==========================================
- Hits       100182   100067     -115     
- Misses      34755    34770      +15     

Flag	Coverage Δ
rust	74.21% <ø> (-0.04%)	⬇️

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

Impacted Files	Coverage Δ
src/batch/src/error.rs	0.00% <ø> (ø)
src/batch/src/executor/generic_exchange.rs	41.52% <ø> (+0.14%)	⬆️
src/batch/src/executor/join/hash_join.rs	95.36% <ø> (ø)
src/batch/src/executor/join/lookup_join.rs	57.28% <ø> (+1.12%)	⬆️
src/batch/src/executor/monitor/stats.rs	66.01% <ø> (-8.99%)	⬇️
src/batch/src/executor/row_seq_scan.rs	17.67% <ø> (+0.66%)	⬆️
src/common/src/config.rs	64.46% <ø> (+0.29%)	⬆️
src/common/src/hash/key.rs	84.49% <ø> (-1.62%)	⬇️
src/common/src/types/interval.rs	81.33% <ø> (-1.18%)	⬇️
src/compute/src/server.rs	0.00% <ø> (ø)
... and 167 more

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