fix: Python引擎P0 Bug修复 + 参考文档4处数据修正

P0 Bug修复（scripts/）:
- jyotish_engine.py: Chara Karaka改用degree_in_sign(0-30)替代degree(0-360)
- jyotish_engine.py: DK提取路径从ck7.get('DK')改为ck7['karaka_table']['Darakaraka']
- jaimini.py: Rahu逆行边界从(30-deg)%30改为30.0-deg
- jyotish_engine.py: status标签入庙(Exalted)→入旺(Exalted)术语纠正

参考文档修正（references/）:
- vimshottari_dasha_guide.md: 15°Aries星宿边界Ashwini→Bharani
- planetary-dignity-complete-reference.md: 水星逆行燃烧12°→8°
- marriage-timing-comprehensive-techniques.md: UL计算公式重写
- planets.md: 燃烧度数补充逆行变体注释

验证：一楠星盘AK=Sun✓ DK=Venus✓ (修复前AK=Jupiter DK=Mars)

scripts/jaimini.py

@@ -108,8 +108,8 @@ def calc_chara_karaka_8(planet_degrees: Dict[str, float]) -> Dict:
         if pname == 'Ketu':
             continue
         if pname == 'Rahu':
-            # Rahu用反向度数
-            planets[pname] = (30 - deg) % 30
+            # Rahu逆行：用反向度数（30 - 度数），不取模以保留30.0边界值
+            planets[pname] = 30.0 - deg
         else:
             planets[pname] = deg