Import S-CANVAS source + iter=1~7 lint cleanup

S-CANVAS (Saman Corp.) — DXF + DEM + AI 기반 3D 조감도 생성 엔진.
~24k LOC Python (scanvas_maker.py 7072 LOC GUI + 구조물 파서/빌더 다수).

이 커밋은 7-iter cleanup이 적용된 상태로 import:
- F821 8 + B023 6: 비동기 lambda + except/loop 변수 캡처 NameError
  (Py3.13에서 reproduce 확인된 진짜 버그)
- RUF012 4 + RUF013 1: ClassVar / implicit Optional 명시화
- F811/B905/B904/F401/F841/W293/F541/UP/SIM/RUF/PLR 700+ cleanup/modernization

신규 파일:
- ruff.toml: target=py313, Korean unicode/저자 스타일/도메인 복잡도 무력화
- requirements-py313.txt: pyproj>=3.7, scipy>=1.14, numpy>=2.0.2 (Py3.13 wheel)
- .gitignore: gcp-key.json, 캐시, 백업, 생성 이미지 제외

검증: ruff 0 errors, py_compile 0 errors, import 33/33 OK on Py3.13.13.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

_unused/scratch/analyze_dxf.py

@@ -0,0 +1,52 @@
+import ezdxf
+import numpy as np
+
+def analyze_dxf(filepath):
+    print(f"Analyzing: {filepath}")
+    doc = ezdxf.readfile(filepath)
+    msp = doc.modelspace()
+    
+    points = []
+    
+    # 1. LWPOLYLINE, POLYLINE
+    for entity in msp.query('LWPOLYLINE POLYLINE'):
+        elevation = 0
+        if hasattr(entity, 'dxf'):
+            elevation = entity.dxf.elevation if hasattr(entity.dxf, 'elevation') else 0
+        
+        for p in entity.get_points():
+            if len(p) >= 3:
+                points.append((p[0], p[1], p[2]))
+            else:
+                points.append((p[0], p[1], elevation))
+
+    # 2. LINE
+    for entity in msp.query('LINE'):
+        points.append(entity.dxf.start)
+        points.append(entity.dxf.end)
+
+    if not points:
+        print("No points found!")
+        return
+
+    pts = np.array(points)
+    min_vals = np.min(pts, axis=0)
+    max_vals = np.max(pts, axis=0)
+    ranges = max_vals - min_vals
+    
+    print("\n[Statistics]")
+    print(f"Total points: {len(pts)}")
+    print(f"X: {min_vals[0]:.2f} to {max_vals[0]:.2f} (Range: {ranges[0]:.2f})")
+    print(f"Y: {min_vals[1]:.2f} to {max_vals[1]:.2f} (Range: {ranges[1]:.2f})")
+    print(f"Z: {min_vals[2]:.2f} to {max_vals[2]:.2f} (Range: {ranges[2]:.2f})")
+    
+    # Ratio
+    if ranges[0] > 0 and ranges[1] > 0:
+        xy_avg_range = (ranges[0] + ranges[1]) / 2
+        z_ratio = (ranges[2] / xy_avg_range) * 100
+        print(f"Z-Ratio to XY: {z_ratio:.4f}%")
+        if z_ratio < 0.1:
+            print("WARNING: Z-range is extremely small compared to XY. Vertical exaggeration is required.")
+
+if __name__ == "__main__":
+    analyze_dxf('사연댐 전체계획 평면도_contour.dxf')