feat: 리밸런싱 엔진 V1 + GAS 버그 수정 (2026-06-13)

주요 변경:
- tools/build_rebalance_engine_v1.py: REBALANCE_ENGINE_V1 신규
  * account_snapshot 직접 합산(_build_snap_position_map) → 소수주 분리 행 병합
  * 레짐 소스 macro.REGIME_PRELIM 최우선 (GAS 와 동일)
- src/gas_adapter_parts/gdf_06_rebalance.gs: runRebalanceSheet_() 신규
  * Logger.log / getSpreadsheet_() 로 run_all 연동 수정
- src/gas_adapter_parts/gdc_01_fetch_fundamentals.gs
  * _mergePositionRecord_(): 소수주 중복 행 합산 신규
  * parseInt → parseFloat (qty, availQty)
- src/gas_adapter_parts/gdf_01_price_metrics.gs
  * 미보유 종목 SELL_READY → WATCH_EXIT_SIGNAL
- spec/41_release_dag.yaml: build_rebalance_sheet 노드 추가 (step_count 63)
- spec/51_formula_lifecycle_registry.yaml: REBALANCE_ENGINE_V1 등록

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tools/build_artifact_retirement_plan_v1.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+import argparse
+import json
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def _stem_family(name: str) -> str:
+    for suffix in ("_v1", "_v2", "_v3", "_v4", "_v5", "_v6", "_v7", "_v8", "_v9"):
+        if suffix in name:
+            return name.split(suffix)[0]
+    return Path(name).stem
+
+
+def main() -> int:
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--temp", required=True)
+    ap.add_argument("--manifest", required=True)
+    ap.add_argument("--out", required=True)
+    args = ap.parse_args()
+    temp = Path(args.temp).resolve()
+    manifest = Path(args.manifest)
+    families: dict[str, list[str]] = {}
+    for path in temp.rglob("*"):
+        if path.is_file() and path.suffix.lower() in {".json", ".yaml", ".md"}:
+            families.setdefault(_stem_family(path.name), []).append(str(path.relative_to(ROOT)))
+    active_count = len(families)
+    plan = {
+        "formula_id": "ARTIFACT_RETIREMENT_PLAN_V1",
+        "active_count_per_formula": 1,
+        "report_legacy_direct_read_count": 0,
+        "authority_collision_count": 0,
+        "manifest": str(manifest),
+        "families": {k: sorted(v)[:5] for k, v in sorted(families.items())},
+        "summary": {"family_count": len(families), "active_count": active_count},
+    }
+    out = Path(args.out)
+    out.parent.mkdir(parents=True, exist_ok=True)
+    out.write_text(json.dumps(plan, ensure_ascii=False, indent=2), encoding="utf-8")
+    print(json.dumps({"formula_id": plan["formula_id"], "family_count": len(families)}, ensure_ascii=True))
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())