[#675] fix: dashboard page fetch http 422 with DAG list API

[yohamta]

Resolves #675

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 64.08%. Comparing base (3c4f636) to head (4a9015b).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/client/client.go	0.00%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #680      +/-   ##
==========================================
- Coverage   64.68%   64.08%   -0.61%     
==========================================
  Files          53       53              
  Lines        4315     4318       +3     
==========================================
- Hits         2791     2767      -24     
- Misses       1269     1298      +29     
+ Partials      255      253       -2     

Files with missing lines	Coverage Δ
internal/client/client.go	63.15% <0.00%> (-11.51%)	⬇️

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