feat(review): 核对包改成医生读得懂；资料库超声一路只留给 agent 的参数

- ceus：灌注指标改为对病灶去暗区（roi_perf）和紫圈（roi_pan）两组算，roi_all 指标删除；
  D1–D4 仍要 roi_all、roi_perf 两条都过才定位（负责人 2026-10-17：医生要正常区与病灶对比看）
- build/library：tic.json 只出两组 11 个指标与 7 个槽位的视频时间；医生截图挪进
  ultrasound/keyframes/key.png，UltrasoundRoute 去掉 key_image、keyframes 多一个 key
- review：TIC参数.csv 取代 TIC结果.csv；问题清单按原因对照表写成大白话，对照表外的原因报错；
  程序原文进 snapshot/问题清单_原文.csv；说明.pdf 整份重写为合作者口吻
- 文档：结构.md、医生核对包、装配两个库、CEUS定量

任务书 04。

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_build_outputs.py

@@ -78,7 +78,7 @@ def test_visibility_sex_and_age_only_in_clinical_route(tmp_path: Path) -> None:
         assert files == [
             "clinical/clinical.json",
             "mr/report.txt",
-            "ultrasound/key.png",
+            "ultrasound/keyframes/key.png",
             "ultrasound/report.txt",
         ]
         clinical = json.loads((case_dir / "clinical/clinical.json").read_text(encoding="utf-8"))
@@ -195,7 +195,7 @@ def test_key_image_pixels_kept_and_text_chunk_dropped(tmp_path: Path) -> None:
         with Image.open(source) as original:
             assert original.info.get("PatientName") == "should-not-survive"
             original_mode, original_pixels = original.mode, original.tobytes()
-        copied = read_ultrasound(summary.library_dir, alias).key_image
+        copied = read_ultrasound(summary.library_dir, alias).keyframes["key"]
         with Image.open(copied) as image:
             assert image.mode == original_mode
             assert image.tobytes() == original_pixels
@@ -282,7 +282,7 @@ def test_key_image_one_bit_kept_as_is(tmp_path: Path) -> None:
     library_root = tmp_path / "library"
     (library_dir,) = list(library_root.iterdir())
     by_case = {r.case_no: r.alias for r in read_aliases(tmp_path / "answers" / library_dir.name)}
-    copied = read_ultrasound(library_dir, by_case["002"]).key_image
+    copied = read_ultrasound(library_dir, by_case["002"]).keyframes["key"]
     with Image.open(copied) as image:
         assert image.mode == "1"
         assert image.tobytes() == source.tobytes()