Initial CivilPlan MCP implementation

tests/test_impacts.py

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+from civilplan_mcp.tools.impact_evaluator import evaluate_impact_assessments
+
+
+def test_evaluate_impact_assessments_flags_borderline_disaster_review() -> None:
+    result = evaluate_impact_assessments(
+        domain="토목_도로",
+        project_type="도로",
+        road_length_m=890,
+        development_area_m2=5340,
+        total_cost_billion=10.67,
+        building_floor_area_m2=None,
+        housing_units=None,
+        is_urban_area=True,
+        near_cultural_heritage=False,
+        near_river=False,
+        near_protected_area=False,
+    )
+
+    target = next(item for item in result["evaluations"] if item["name"] == "재해영향평가")
+    assert target["result"] == "BORDERLINE"