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_final_context_for_llm_v1.py

@@ -0,0 +1,32 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+from refactor_master_helpers import ROOT, load_json
+
+
+def main() -> int:
+    candidates = [
+        ROOT / "Temp" / "final_context_for_llm_v3.json",
+        ROOT / "Temp" / "final_context_for_llm_v2.json",
+        ROOT / "Temp" / "final_context_for_llm_v1.json",
+    ]
+    source = next((p for p in candidates if p.exists()), None)
+    data = load_json(source) if source else {}
+    result = {
+        "formula_id": "FINAL_CONTEXT_FOR_LLM_V1",
+        "renderer_input_count": 1 if source else 0,
+        "final_context_schema_status": "OK" if source else "MISSING",
+        "deprecated_final_context_versions_not_used_by_renderer": True,
+        "source_file": str(source) if source else "DATA_MISSING",
+        "gate": "PASS" if source else "FAIL",
+    }
+    out = ROOT / "Temp" / "final_context_for_llm_v1_validation.json"
+    out.write_text(json.dumps(result, ensure_ascii=False, indent=2), encoding="utf-8")
+    print(json.dumps(result, ensure_ascii=True, indent=2))
+    return 0 if source else 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())