feat: sync pool support for memory optimization

[sumslim]

Using sync.Pool for cancelFnList can help to optimize memory management by reusing the list between API calls, rather than repeatedly allocating and deallocating it.

Service Creation Frequency: If delete API calls are often, sync.Pool can reduce the cost of list allocation.
Memory Efficiency: Instead of garbage collecting after each use, the pool reuses the same memory, improving performance in high-traffic scenarios.

[coveralls]

Pull Request Test Coverage Report for Build 10993915225

Details

• 9 of 11 (81.82%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.005%) to 84.15%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core/asset/service.go	9	11	81.82%

Totals
Change from base Build 10676380823:	-0.005%
Covered Lines:	6918
Relevant Lines:	8221

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💛 - Coveralls