fix: fix slice init length

[cuishuang]

The intention here should be to initialize a slice with a capacity of len(scheduleActionRecords) rather than initializing the length of this slice.

The online demo: https://go.dev/play/p/q1BcVCmvidW

PR Checklist

Please check if your PR fulfills the following requirements:

• I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
• I am not introducing a new dependency (add notes below if you are)
• I have added unit tests for the new feature or bug fix (if not, why?)
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Testing Instructions

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Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 31.86%. Comparing base (5b6b5ce) to head (51dc6ba).

Files with missing lines	Patch %	Lines
...kg/infrastructure/postgres/scheduleactionrecord.go	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4938   +/-   ##
=======================================
  Coverage   31.86%   31.86%           
=======================================
  Files         265      265           
  Lines       19318    19318           
=======================================
  Hits         6156     6156           
  Misses      11770    11770           
  Partials     1392     1392           

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[cloudxxx8]

LGTM, thanks for the good catch