fix: batch create tasks with duplicate names

[monkeyWie]

related: #609

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 62.50%. Comparing base (1f791c6) to head (f4950e7).

Files	Patch %	Lines
pkg/rest/server.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #635      +/-   ##
==========================================
+ Coverage   61.52%   62.50%   +0.98%     
==========================================
  Files          35       35              
  Lines        3514     3518       +4     
==========================================
+ Hits         2162     2199      +37     
+ Misses       1086     1041      -45     
- Partials      266      278      +12     

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