Initial CivilPlan MCP implementation

tests/test_quantities.py

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+from civilplan_mcp.tools.quantity_estimator import estimate_quantities
+from civilplan_mcp.tools.unit_price_query import get_unit_prices
+
+
+def test_estimate_quantities_returns_expected_pavement_area() -> None:
+    result = estimate_quantities(
+        road_class="소로",
+        length_m=890,
+        width_m=6.0,
+        terrain="구릉",
+        pavement_type="아스콘",
+        include_water_supply=True,
+        include_sewage=True,
+        include_retaining_wall=True,
+        include_bridge=False,
+        bridge_length_m=0.0,
+    )
+
+    assert result["road_spec"]["pavement_area_m2"] == 5340.0
+    assert result["quantities"]["포장"]["아스콘표층_t"] > 0
+
+
+def test_get_unit_prices_applies_region_factor() -> None:
+    result = get_unit_prices(category="포장", item_name="아스콘", region="경기도", year=2026)
+
+    assert result["results"]
+    assert result["results"][0]["adjusted_price"] > result["results"][0]["base_price"]