feat: sector trend analysis + ETF representative monitor (DAG step_count 81->83)

- src/quant_engine/sector_trend_analysis.py: ETF proxy 기반 11개 섹터 동향 + smart money lens
- src/quant_engine/etf_representative_monitor.py: ETF 대표 종목 8개 추적 + 벤치마크 연동
- tools/build_sector_trend_analysis_v1.py: SECTOR_TREND_ANALYSIS_V1 Temp JSON 생성
- tools/build_etf_representative_monitor_v1.py: ETF_REPRESENTATIVE_MONITOR_V1 Temp JSON 생성
- tools/update_workbook_sector_insights.py: Google Sheets 섹터 인사이트 동기화
- spec/41_release_dag.yaml: step_count 81->83, wave_1에 2개 신규 노드 등록
- validate_engine_harness_gate.py: CHECK_87B (SECTOR_TREND_ANALYSIS_V1) + ETF monitor DAG 스텝 추가
- render_operational_report.py: sector_trend_analysis_v1 / etf_representative_monitor_v1 / portfolio_performance_summary 섹션 추가
- gas_lib.gs: doPost + syncSectorInsightSheets_ (섹터 인사이트 GAS 동기화 엔드포인트)

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

tools/automate_routine.py

@@ -2,6 +2,7 @@ import json
 import os
 import requests
 import time
+import subprocess
 from pathlib import Path
 
 ROOT = Path(__file__).resolve().parent.parent
@@ -93,6 +94,12 @@ def main():
                 print("\nDownload failed. Please check Drive API scopes.")
         else:
             print("\nGAS execution failed. Process aborted.")
+            print("Falling back to local workbook sector-insight build...")
+            fallback = subprocess.run(["python", "tools/update_workbook_sector_insights.py"], cwd=str(ROOT))
+            if fallback.returncode == 0:
+                print("Local sector-insight workbook updated.")
+            else:
+                print("Local sector-insight workbook build failed.")
             
     except Exception as e:
         print(f"Error: {e}")