fix: check raw AD mail attribute, not UPN fallback, for email availability check

instruct/handlers.py

@@ -155,7 +155,7 @@ def get_ad_user_info(user_id: str) -> dict | None:
                 if raw_upn and raw_upn not in ("[]", "N/A", ""):
                     mail = raw_upn
             city = str(entry.l) if 'l' in entry and entry.l.value else "Кемерово"
-            return {"cn": cn, "mail": mail, "city": city}
+            return {"cn": cn, "mail": mail, "raw_mail": raw_mail, "city": city}
     except Exception as e:
         logger.error(f"Ошибка получения AD info для {user_id}: {e}", exc_info=True)
     return None
@@ -432,9 +432,9 @@ async def instruct_router_handler(msg: Message):
             if cn is None:
                 cn = user_id
             ad_info = get_ad_user_info(user_id)
-            mail = ad_info.get("mail") if ad_info else None
-            if mail:
-                text = INSTRUCT_EMAIL_AVAILABLE(EMOJI_DIGITS, cn, mail)
+            raw_mail = ad_info.get("raw_mail") if ad_info else None
+            if raw_mail:
+                text = INSTRUCT_EMAIL_AVAILABLE(EMOJI_DIGITS, cn, raw_mail)
             else:
                 text = INSTRUCT_EMAIL_UNAVAILABLE(EMOJI_DIGITS, cn)
             await msg.answer(text, parse_mode="html")