The legacy 2D (EA) client copies each OPL property's argument into a fixed ~512-char
(1024-byte) buffer; a single property that exceeds it overruns the heap and crashes the
client. OplTextBlock previously emitted one entry regardless of length.
- ObjectPropertyList.MaxArgumentLength (504 chars, under the ~510 ceiling).
- ClampArgument backstop in both InternalAdd paths (span + interpolation): truncates an
oversized argument and logs the offending entity/cliloc.
- AddChunked(ReadOnlySpan<char>): splits newline-joined text across multiple cycling
passthrough properties, breaking only at '\n', so none exceeds the cap.
- OplTextBlock.Dispose emits via AddChunked; AddChunked added to IPropertyList.
string converts implicitly to ReadOnlySpan<char>, so Add(ReadOnlySpan<char>) subsumes
Add(string); $"..." literals still bind to the interpolated-string-handler overload
(zero-alloc). OplTextBlock now holds an IPropertyList instead of the concrete
ObjectPropertyList.
