sync V9 no-speech teacher-object guard from qt2 e8eee55

src/pronoun_harmonizer_v9.py

@@ -152,6 +152,8 @@ def dialogue_context(source: str) -> str:
 
 
 def contains_dialogue_context_any(source: str, terms: tuple[str, ...]) -> bool:
+    if not has_speech_marker(source):
+        return False
     return contains_source_any(dialogue_context(source), terms)