fix: acceptance test 加载 IR 时应用 _normalize_rule 修复旧 IR 文件中的 schema 问题 - Closes #57

ir_data fixture 在加载 ir_final.json 后对每条 rule 调用 _normalize_rule，
确保旧 pipeline 输出也能受益于最新的防御性修复（非法 source type、
缺失 section 字段等）。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/acceptance/conftest.py

@@ -140,9 +140,19 @@ def ir_path(request) -> str:
 
 @pytest.fixture(scope="session")
 def ir_data(ir_path: str) -> dict:
-    """Load the IR JSON data."""
+    """Load the IR JSON data, normalizing each rule for defensive schema fixes."""
     with open(ir_path, "r", encoding="utf-8") as f:
-        return json.load(f)
+        data = json.load(f)
+
+    # Apply normalize to every rule so old IR files benefit from latest fixes
+    # (invalid source types, missing section fields, trigger nulls, etc.)
+    sys.path.insert(0, str(_PROJECT_ROOT / "skills" / "ir_generation_skill"))
+    from step3_merge_and_audit import _normalize_rule
+    rules = data.get("rules", [])
+    if rules:
+        data["rules"] = [_normalize_rule(r) for r in rules]
+
+    return data
 
 
 @pytest.fixture(scope="session")