- Add missing MakeResourceGUID helper function to resourcetypes.md
- Add note about GetResourceType<T>() template specializations
- Merge duplicate '缓存控制' section into '内存管理' in resourcecache.md
- Verify all methods documented match source code implementations
Fixed documentation to match:
- ResourceTypes.h: MakeResourceGUID function now documented
- ResourceCache.h: OnZeroRefCount and Clear methods now properly listed
- AsyncLoader.md: Removed duplicate progress query section
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