chore(rebar): Pier_T_rebar 작업 폴더 초기 구성 및 외부 의존 파일 통합

- Code\rebar_pipeline, review_pipeline, pier-program을 정션에서 실제 폴더로 전환
- Code\rhino_mcp 및 CLAUDE_rhino배경.md 추가, .mcp.json은 PYTHONPATH로 새 위치 사용
- pier-program 내부 .git 제거(이력은 backup\pier-program_20261028.bundle에 보관)
- worktree 가이드 반영(CLAUDE.local.md, HANDOFF.md)
- D:\Rhino-MCP 경로 참조를 새 위치로 치환

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

Code/교각모델링/convert_dwg.py

@@ -0,0 +1,62 @@
+"""Stage 1: convert source DWG drawings to DXF with ODA File Converter.
+
+Mirrors the audit record of the box project's dwg_conversion.py
+(source/output SHA-256, entity count, drawing_verified=False).
+RAG sources are read only; existing DXF outputs are never overwritten.
+"""
+import hashlib
+import json
+import shutil
+import subprocess
+import sys
+import tempfile
+from pathlib import Path
+
+import ezdxf
+
+ROOT = Path(__file__).resolve().parents[2]
+SOURCE_DIR = ROOT / "RAG"
+OUT_DIR = Path(__file__).resolve().parent / "입력DXF"
+ODA = Path(r"C:\Program Files\ODA\ODAFileConverter 27.1.0\ODAFileConverter.exe")
+PATTERN = "C0050205-02*-운곡교 교각도*.dwg"
+
+
+def sha256(path):
+    return hashlib.sha256(path.read_bytes()).hexdigest()
+
+
+def main():
+    sources = sorted(SOURCE_DIR.glob(PATTERN))
+    if len(sources) != 3:
+        sys.exit(f"expected 3 source DWG, found {len(sources)}")
+    OUT_DIR.mkdir(exist_ok=True)
+    audit = []
+    with tempfile.TemporaryDirectory() as tmp:
+        tmp_in, tmp_out = Path(tmp, "in"), Path(tmp, "out")
+        tmp_in.mkdir(), tmp_out.mkdir()
+        # Copy so the converter never touches RAG originals.
+        for src in sources:
+            shutil.copy2(src, tmp_in / src.name)
+        subprocess.run([str(ODA), str(tmp_in), str(tmp_out), "ACAD2018", "DXF", "0", "1", "*.DWG"],
+                       check=True, timeout=600)
+        for src in sources:
+            produced = tmp_out / (src.stem + ".dxf")
+            target = OUT_DIR / produced.name
+            if not produced.is_file():
+                sys.exit(f"conversion failed: {src.name}")
+            if target.exists():
+                sys.exit(f"existing DXF must not be overwritten: {target.name}")
+            shutil.copy2(produced, target)
+            doc = ezdxf.readfile(target)
+            audit.append(dict(source=str(src.relative_to(ROOT)), engine="ODA File Converter 27.1.0",
+                              source_sha256=sha256(src), output=str(target.relative_to(ROOT)),
+                              output_sha256=sha256(target), dxf_version=doc.dxfversion,
+                              modelspace_entity_count=len(doc.modelspace()),
+                              layer_count=len(doc.layers), drawing_verified=False))
+    (OUT_DIR / "conversion_audit.json").write_text(json.dumps(audit, ensure_ascii=False, indent=2),
+                                                    encoding="utf-8")
+    print(json.dumps(audit, ensure_ascii=False, indent=2))
+
+
+if __name__ == "__main__":
+    main()