Modernize Ranges usage in ResizableDirectMemoryBase

**Location:** cpp/Platform.Memory/ResizableDirectMemoryBase.h:78

**Current code:**
```cpp
// TODO: Use modernize Ranges version
Ensure::Always::ArgumentInRange(value, Range(0, _reservedCapacity));
```

**Issue:**
The current code uses an older Ranges API and should be updated to use the modernized version.

**Suggestion:**
Update the Range usage to follow the modern Ranges API conventions and patterns.

Open cpp/Platform.Memory/ResizableDirectMemoryBase.h at line 78 and inspect the existing Range call and its surrounding validation. Search the repository for current modern Ranges API usage, then update this call to match those conventions while preserving the 0-to-_reservedCapacity check.

Written by the indexing model from the issue text.