fix(binding): prevent duplicate decoding and add validation in decodeToml

[revevide]

// binding/toml.go:29
func decodeToml(r io.Reader, obj any) error {
	decoder := toml.NewDecoder(r)
	if err := decoder.Decode(obj); err != nil {
		return err
	}
	return decoder.Decode(obj)
}

• Removed the redundant second call to decoder.Decode(obj) which caused incorrect behavior.
• Added a validate(obj) function to ensure proper validation of decoded TOML data.
• Fixes potential issues with data integrity caused by duplicate decoding.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.99%. Comparing base (3dc1cd6) to head (0a36ef7).
Report is 95 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4193      +/-   ##
==========================================
- Coverage   99.21%   98.99%   -0.22%     
==========================================
  Files          42       44       +2     
  Lines        3182     3395     +213     
==========================================
+ Hits         3157     3361     +204     
- Misses         17       24       +7     
- Partials        8       10       +2     

Flag	Coverage Δ
	?
--ldflags="-checklinkname=0" -tags "sonic avx"	98.99% <100.00%> (?)
-tags go_json	98.99% <100.00%> (?)
-tags nomsgpack	98.98% <100.00%> (?)
go-1.18	?
go-1.19	?
go-1.20	?
go-1.21	?
go-1.23	98.99% <100.00%> (?)
go-1.24	98.99% <100.00%> (?)
macos-latest	98.99% <100.00%> (-0.22%)	⬇️
ubuntu-latest	98.99% <100.00%> (-0.22%)	⬇️

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