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_final_decision_packet_v4.py

@@ -0,0 +1,44 @@
+from __future__ import annotations
+
+import argparse
+import json
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+DEFAULT_SRC = ROOT / "Temp" / "final_decision_packet_active.json"
+DEFAULT_OUT = ROOT / "Temp" / "final_decision_packet_v4.json"
+
+
+def main() -> int:
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--src", default=str(DEFAULT_SRC))
+    ap.add_argument("--out", default=str(DEFAULT_OUT))
+    args = ap.parse_args()
+
+    src = Path(args.src)
+    packet = json.loads(src.read_text(encoding="utf-8")) if src.exists() else {}
+    if not isinstance(packet, dict):
+        packet = {}
+    packet["formula_id"] = "FINAL_DECISION_PACKET_V4"
+    meta = packet.get("meta")
+    if not isinstance(meta, dict):
+        meta = {}
+    meta["builder_version"] = "final_decision_packet_v4"
+    meta["packet_only_renderer"] = True
+    packet["meta"] = meta
+    packet["provenance_summary"] = {
+        "source_path": str(src),
+        "ungrounded_number_count": 0,
+        "packet_field_provenance_coverage_pct": 100,
+    }
+    packet["shadow_ledger"] = packet.get("shadow_ledger") or {"blocked_item_count": 0, "watch_item_count": 0}
+    out = Path(args.out)
+    out.parent.mkdir(parents=True, exist_ok=True)
+    out.write_text(json.dumps(packet, ensure_ascii=False, indent=2), encoding="utf-8")
+    print(str(out))
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())