fix: error type conversion

[hwjiangkai]

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary

What is changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

[codecov]

Codecov Report

Merging #581 (2519e1e) into main (ee76217) will decrease coverage by 2.34%.
The diff coverage is 45.59%.

❗ Current head 2519e1e differs from pull request most recent head 8d60c09. Consider uploading reports for the commit 8d60c09 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #581      +/-   ##
==========================================
- Coverage   57.07%   54.73%   -2.34%     
==========================================
  Files         190      211      +21     
  Lines       15191    16918    +1727     
==========================================
+ Hits         8670     9260     +590     
- Misses       5884     6960    +1076     
- Partials      637      698      +61     

Impacted Files	Coverage Δ
internal/controller/trigger/storage/storage.go	0.00% <ø> (ø)
internal/gateway/proxy/auth.go	0.00% <0.00%> (ø)
internal/gateway/proxy/deadletter.go	0.00% <0.00%> (ø)
internal/gateway/proxy/direct.go	15.84% <ø> (-57.50%)	⬇️
internal/gateway/proxy/proxy.go	23.23% <ø> (+0.14%)	⬆️
internal/gateway/proxy/reigister.go	100.00% <ø> (ø)
internal/gateway/proxy/util.go	0.00% <ø> (ø)
...nternal/primitive/authentication/authentication.go	34.09% <ø> (ø)
internal/primitive/authentication/client.go	0.00% <ø> (ø)
internal/primitive/authorization/action.go	0.00% <ø> (ø)
... and 73 more

... and 56 files with indirect coverage changes

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[ifplusor]

LGTM