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>

tests/generate_golden.py

@@ -148,11 +148,11 @@ def analyze_contract_keys() -> dict:
                 "macd",
                 "chan_macd",
                 "klc_trend",
+                "wyckoff",
             ]
         ),
         "optional_when": {
             "include_structure_zones": ["structure_zones"],
-            "include_wyckoff": ["wyckoff"],
         },
         "wyckoff_keys": [
             "trading_range",
@@ -162,6 +162,7 @@ def analyze_contract_keys() -> dict:
             "volume_profile",
             "volume_confirm",
         ],
+        "notes": "wyckoff 随主周期 analyze 默认返回；有次/次次周期时另附 element_wyckoff / sub_sub_wyckoff；include_wyckoff=0 可跳过；elements_only 时不返回",
     }