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_calibration_change_ledger_v1.py

@@ -0,0 +1,51 @@
+"""validate_calibration_change_ledger_v1.py — CALIBRATION_CHANGE_LEDGER_V1 validator"""
+from __future__ import annotations
+
+import json
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+PATH = ROOT / "Temp" / "calibration_change_ledger_v4.json"
+
+
+def main() -> int:
+    if not PATH.exists():
+        print("CALIBRATION_CHANGE_LEDGER_FAIL: missing Temp/calibration_change_ledger_v4.json")
+        return 1
+    try:
+        data = json.loads(PATH.read_text(encoding="utf-8"))
+    except Exception as exc:
+        print(f"CALIBRATION_CHANGE_LEDGER_FAIL: invalid json ({exc})")
+        return 1
+
+    changes = data.get("changes") if isinstance(data.get("changes"), list) else []
+    ledger_without_change_count = int(data.get("threshold_change_without_ledger_count") or 0)
+    linked = data.get("linked_outcome_artifacts") if isinstance(data.get("linked_outcome_artifacts"), list) else []
+
+    missing = []
+    for idx, item in enumerate(changes):
+        if not isinstance(item, dict):
+            missing.append(f"changes[{idx}] not object")
+            continue
+        for key in ("threshold_id", "outcome_link", "registry_link"):
+            if key not in item:
+                missing.append(f"changes[{idx}] missing {key}")
+
+    ok = bool(changes) and ledger_without_change_count == 0 and "Temp/outcome_ledger_v1.json" in linked and not missing
+    if ok:
+        print("CALIBRATION_CHANGE_LEDGER_OK")
+        print(f"changes={len(changes)} linked_outcome_artifacts={len(linked)}")
+        return 0
+
+    print("CALIBRATION_CHANGE_LEDGER_FAIL")
+    print(f"changes={len(changes)} threshold_change_without_ledger_count={ledger_without_change_count} linked={linked}")
+    if missing:
+        for item in missing[:10]:
+            print(f"- {item}")
+    return 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())