feat(ECR-007): Wyckoff Live Structure with Confirmed/Live isolation

Add live.py lifecycle and event candidates; assemble confirmed vs live
in engine; Summary partition; execution_signal source=confirmed only.
Keep strategies untouched; do not lower Confirmed thresholds for Live.

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

docs/CHANGELOG/CHANGELOG.md

@@ -1,5 +1,14 @@
 # CHANGELOG
 
+## Unreleased — 2026-08-07
+
+### ECR-007（L2，LOOP-RUN-005）
+
+- Wyckoff **Live Structure**：`live.py` + engine 组装 `lifecycle` / `confirmed` / `live`
+- Event candidates（Spring/SOS/LPS/UTAD）+ 可解释 confidence；Summary Confirmed/Live 分区
+- `execution_signal_from_wyckoff` **仅** `source=confirmed`；Live-only → None
+- **No** Confirmed 门槛降低；**No** strategies / 自动交易
+
 ## Unreleased — 2026-08-06
 
 ### ECR-004（L2，Reviewed）
@@ -7,6 +16,7 @@
 - 威科夫 TR 评分选段（防吞前置趋势）；阶段非重叠最小跨度
 - 主站 VP Top-8 + bins≤24；填充线减负
 - `elements_only` 时不跑威科夫；收紧单测（无币种独立参数）
+- **后续**：威科夫随主 `/api/analyze` 默认一并返回；前端开关只控制绘制（不再勾选才加载）
 
 ### ECR-003（L2，Reviewed）