fix(ephemeris): include nutation in the sidereal frame

恒星黄道改为与 Swiss Ephemeris FLG_SIDEREAL 同一套含章动岁差。
产品默认路径不再用平岁差去减含章动的视位置。上升和宫头用同一个岁差。
校正身份升到 rectification-v5-matrix-scoring-12。
BUG-1275。未推送，未部署。v5 先验头名三格下降 1.3 个百分点，不调参。

scripts/validate_yoga_accuracy.py

@@ -23,7 +23,7 @@ import traceback
 from pathlib import Path
 from typing import Dict, List, Optional, Tuple, Set
 
-from ayanamsa_utils import sidereal_flags
+from ayanamsa_utils import sidereal_ayanamsa_degrees, sidereal_flags
 
 # ============================================================
 # 路径设置
@@ -103,7 +103,7 @@ def skill_compute_chart(year, month, day, hour, minute, lat, lon, tz,
 
     # Ayanamsa
     flags = sidereal_flags(swe, 'lahiri')
-    ayanamsa = swe.get_ayanamsa_ut(jd)
+    ayanamsa = sidereal_ayanamsa_degrees(jd, swe)
 
     # Ascendant
     asc_info = swe.houses(jd, lat, lon, b'A')  # 'A' = equal houses (Vedic)