Major upstream refactoring: Corner→Scene, Mode architecture, warning
format change (Warning ID:), command renames, and many API signature
changes. Adapted all C++ test files and TCL test scripts/expected
output files to pass with the new API. 6159/6159 tests pass.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Jaehyun Kim <jhkim@precisioninno.com>
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