ci(validation): harden post-release checks

[JimmyDaddy]

Summary

Runtime impact

• Android legacy architecture
• Android New Architecture
• iOS legacy architecture
• iOS New Architecture
• React Native Web
• Documentation or tooling only

Verification

Checklist

• Public API changes include TypeScript declarations and bilingual docs.
• Native C changes include malformed-input coverage and a rebuilt WebAssembly bundle.
• Compatibility or behavior changes include focused regression tests.
• The packed npm artifact was inspected when package contents changed.