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/validate_low_n_pass_gate_v1.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+from refactor_master_helpers import ROOT, load_json
+
+
+def main() -> int:
+    dashboard = load_json(ROOT / "Temp" / "continuous_evaluation_dashboard_v1.json")
+    pass100 = load_json(ROOT / "Temp" / "pass_100_criteria_v3.json")
+    live_t20 = int(dashboard.get("live_t20_count") or 0)
+    min_required = 30
+    pass_100_allowed = bool(pass100.get("pass_100_allowed"))
+    low_n_pass = live_t20 < min_required and pass_100_allowed
+    result = {
+        "formula_id": "LOW_N_PASS_GATE_V1",
+        "live_t20_count": live_t20,
+        "min_required": min_required,
+        "pass_100_allowed": pass_100_allowed,
+        "low_n_pass_count": 1 if low_n_pass else 0,
+        "gate": "FAIL" if low_n_pass else "PASS",
+    }
+    out = ROOT / "Temp" / "low_n_pass_gate_v1.json"
+    out.write_text(json.dumps(result, ensure_ascii=False, indent=2), encoding="utf-8")
+    print(json.dumps(result, ensure_ascii=False, indent=2))
+    return 0 if not low_n_pass else 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())