feat(spec,plugin-security): partial field masking — maskingRule presets + keepHead/keepTail, enforced on the FieldMasker channel (#8993) - #9128

feat(spec,plugin-security): partial field masking — maskingRule presets + keepHead/keepTail, enforced on the FieldMasker channel (#8993)#9128

os-zhuang merged 5 commits into

mainobjectstack-ai/objectstack:mainfrom

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