fix(conf): Memory leak on loading YAML with cyclic dependencies

[DengY11]

I fixes a memory leak issue that occurred when loading a YAML configuration file with self-referencing structs. The previous implementation entered an infinite loop during type analysis, causing a stack overflow. eg:

type Node struct {
    Name     string  `json:"name"`
    Children []*Node `json:"children,optional"`
}

Solution: The fix introduces a robust cycle detection mechanism within the buildFieldsInfo function. It now uses a visited map to keep track of processed types.

I also add a test to show whether it works

close #5140

[codecov[bot]]

Codecov Report

:white_check_mark: All modified and coverable lines are covered by tests.

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