fix(ayanamsa): keep a caller-selected mode across import and transit paths (BUG-1269, upstream 23be1807)

scripts/ayanamsa_utils.py

@@ -45,6 +45,10 @@ AYANAMSA_DISPLAY_NAMES = {
 
 DEFAULT_AYANAMSA_NAME = 'raman'
 ACTIVE_AYANAMSA_NAME = DEFAULT_AYANAMSA_NAME
+# Flipped the first time any caller applies a mode. Import bootstraps read this
+# so they do not replace a mode that was already selected. This module is
+# imported once; jyotish_engine can be loaded a second time as its own module.
+AYANAMSA_APPLIED_IN_PROCESS = False
 
 
 class UnsupportedAyanamsaError(ValueError):
@@ -92,7 +96,7 @@ def current_ayanamsa_name(args: Any = None) -> str:
 
 def apply_ayanamsa(name: Any = None, swe_module: Any = None) -> bool:
     """Set Swiss Ephemeris sidereal mode explicitly."""
-    global ACTIVE_AYANAMSA_NAME
+    global ACTIVE_AYANAMSA_NAME, AYANAMSA_APPLIED_IN_PROCESS
     module = swe_module or swe
     if module is None:
         return False
@@ -102,9 +106,15 @@ def apply_ayanamsa(name: Any = None, swe_module: Any = None) -> bool:
     except Exception:
         return False
     ACTIVE_AYANAMSA_NAME = key
+    AYANAMSA_APPLIED_IN_PROCESS = True
     return True
 
 
+def ayanamsa_already_applied() -> bool:
+    """True once any caller has applied an ayanamsa in this process."""
+    return AYANAMSA_APPLIED_IN_PROCESS
+
+
 @contextmanager
 def temporary_ayanamsa(name: Any = None, swe_module: Any = None) -> Iterator[str]:
     """Apply a sidereal mode and restore the previous process-wide mode."""