fix(extract): ★ 一律按实质性条款处理（口径 Q2 修订）

文件把 ★ 定义成计分项（S02「加★为核心技术参数」）时不再降为「重要」：
删掉 star_scored / STAR_IMPORTANT 及相关分支，不再生成 meaning = important 的标注规则。
S02 的 11 条 ★ 要求离线验证全部为实质性。决策记入 docs/decisions.md。

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

server/tests/test_units.py

@@ -469,21 +469,16 @@ def test_star_section_heading() -> None:
     assert importance_of([ss[4]], d) == ("normal", None)
 
 
-def test_star_defined_as_scored_is_important() -> None:
-    """文件把 ★ 定义成「核心技术参数」、不满足只扣分（S02）：★ 是「重要」，不是实质性（口径 Q2）。"""
+def test_star_defined_as_scored_stays_substantive() -> None:
+    """文件把 ★ 定义成「核心技术参数」、不满足只扣分（S02）：★ 仍按实质性要求（口径 Q2 修订）。"""
     from bid_doctor.checklist.extract import build_doc, importance_of
 
     star, define = sent("★设备采用国产自主可控CPU芯片。", seq=1), sent("备注：加★为核心技术参数；", seq=2)
     scored = sent("每有一项核心技术参数不满足的减4分。", seq=3)
     d = build_doc([star, define, scored])
-    assert is_marked(star, d.declared) is None
-    assert importance_of([star], d) == ("important", "marker")
-    assert [(n.markers, n.meaning) for n in d.notes] == [({"star"}, "important")]
-    # 没有计分证据：维持实质性（降级的代价是把致命显示成重要）
-    assert is_marked(star, build_doc([star, define]).declared) == "star"
-    # 有一处说 ★ 是实质性要求、或者带 ★ 的句子写着后果，就按实质性（顾问审读第 1 条的反例）
-    for extra in ("本文件中打“★”内容为实质性要求。", "打★号的参数负偏离的，视为未响应。"):
-        assert is_marked(star, build_doc([star, define, scored, sent(extra, seq=4)]).declared) == "star"
+    assert is_marked(star, d.declared) == "star"
+    assert importance_of([star], d) == ("substantive", "marker")
+    assert all(n.meaning != "important" for n in d.notes)
 
 
 def test_heuristics_reject_lookalikes() -> None: