让免费层限流的报告跟真实限流一致，并给少一块结果的静默失败留下函数名和错误类型。

Co-Authored-By: Grok (agent loop)

scripts/solar_return.py

@@ -18,6 +18,7 @@ from typing import Dict, Optional, Tuple, List
 from datetime import datetime, timedelta, timezone
 from zoneinfo import ZoneInfo
 import math
+import logging
 import sys
 import os
 
@@ -30,6 +31,8 @@ try:
 except ImportError:
     HAS_SWE = False
 
+logger = logging.getLogger(__name__)
+
 
 def _gregorian_calendar_flag() -> int:
     """Return the Gregorian calendar flag across swisseph builds."""
@@ -140,7 +143,9 @@ def _get_sun_lon_jd(jd_ut: float, ayanamsa_name: str = 'lahiri') -> Optional[flo
     try:
         res = swe.calc_ut(jd_ut, swe.SUN, sidereal_flags(swe, ayanamsa_name))
         return float(res[0][0] % 360.0)
-    except Exception:
+    except Exception as exc:
+        logger.warning("solar_return._get_sun_lon_jd degraded: %s", type(exc).__name__)
+        logger.debug("solar_return._get_sun_lon_jd degraded", exc_info=True)
         return None