feat(spot): fractal_swing live 운영 — 슬리피지·증분 sync·신호 tail 갱신

운영 백테스트(+1,873,140%)과 live/paper 체결 규칙을 맞추고, 캔들 증분 sync·
tail 신호 갱신·일일 체결 상한·슬리피지를 반영한다. docs/live 차트 생성 스크립트와
.env.example·README를 갱신한다.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

@@ -77,16 +77,22 @@ CAUSAL_SIM_REPORT_HTML=docs/spot/2_analysis/causal_sim_report.html
 
 # --- 현물 3단계: 운영 (기본 paper) ---
 OPS_MODE=paper
-OPS_TECHNIQUE_ID=composite_v3
-# OPS_MIN_SCORE=3.5
-OPS_MTF_ENABLED=true
-OPS_TREND_GATE_ENABLED=true
-OPS_DAILY_MAX_TRADES=20
+OPS_TECHNIQUE_ID=fractal_swing
+OPS_MTF_ENABLED=false
+OPS_TREND_GATE_ENABLED=false
+OPS_DAILY_MAX_TRADES=100
 OPS_MIN_ORDER_KRW=5000
+OPS_SLIPPAGE_RATE=0.0005
+OPS_ORDER_INTERVAL_SEC=0.35
 OPS_SYNC_CANDLES=true
-OPS_STATE_JSON=data/spot/operations/ops_state.json
-OPS_REPORT_JSON=docs/spot/3_operations/ops_report.json
-OPS_FILTERED_BACKTEST_JSON=docs/spot/3_operations/filtered_backtest_report.json
+# 비우면 DOWNLOAD_INTERVALS 전체 증분 sync
+# OPS_SYNC_INTERVALS=
+OPS_SIGNAL_TAIL_BARS=800
+# OPS_PERSIST_SIGNAL_CACHE=false
+OPS_STATE_JSON=data/spot/operations/fractal_ops_state.json
+OPS_REPORT_JSON=docs/spot/3_operations/fractal_ops_report.json
+OPS_FILTERED_BACKTEST_JSON=docs/spot/3_operations/fractal_filtered_backtest_report.json
+# composite_v3 운영 시: OPS_TECHNIQUE_ID=composite_v3, OPS_MIN_SCORE=2.5, OPS_MTF_ENABLED=true
 
 # 폴더 구조: data|docs / {common, spot, futures}
 #   common — coins.db 등 공유 리소스