Update: Introductionを推敲し英訳に反映、Related Workの記述を調整 ...

複合基準の言い換え、課題文の削除、AMIの初出展開を反映
sections/1_introduction.texを日本語ドラフトに合わせて更新

Add Japanese draft of Related Work section ...

Three paragraphs covering: manual attenuated-plaque scoring via IVUS
(wu2011), deep-learning-based IVUS segmentation (nishi2021), and the
existing landscape of clinical/angiographic no-reflow prediction
models that don't use IVUS (li2025) — motivating this manuscript's
integration of IVUS imaging with clinical/lesion information.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>