fix: Telegram footer shows SAC as sender when SAC delivers the message

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/telegram_templates.py

@@ -95,7 +95,8 @@ def _line(emoji: str, label: str, value: str) -> str:
     return f"{emoji} {label}: {value}\n"
 
 
-def _event_generated_by(event: Event) -> str:
+def _event_content_author(event: Event) -> str:
+    """Кто сгенерировал содержимое события (ingest / отчёт)."""
     details = _details_dict(event)
     gb = details.get("generated_by")
     if isinstance(gb, str) and gb.strip().lower() in ("agent", "sac"):
@@ -108,6 +109,21 @@ def _event_generated_by(event: Event) -> str:
     return "agent"
 
 
+def _notification_delivered_by(event: Event) -> str:
+    """Кто доставил сообщение в Telegram (footer «📡 Оповещение»).
+
+    Шаблоны здесь используются только при отправке из SAC. Агент добавляет footer сам.
+    """
+    details = _details_dict(event)
+    via = details.get("telegram_via")
+    if isinstance(via, str) and via.strip().lower() in ("agent", "sac"):
+        return via.strip().lower()
+    if _event_content_author(event) == "sac":
+        return "sac"
+    # ingest от агента, канал Telegram — SAC (exclusive / notify_lifecycle)
+    return "sac"
+
+
 def _event_product_version(event: Event) -> tuple[str | None, str | None]:
     details = _details_dict(event)
     platform = None
@@ -137,12 +153,13 @@ def _event_product_version(event: Event) -> tuple[str | None, str | None]:
 
 
 def _append_event_source(html_msg: str, event: Event) -> str:
+    delivered = _notification_delivered_by(event)
     product, version = _event_product_version(event)
     return append_notification_source_html(
         html_msg,
-        generated_by=_event_generated_by(event),
-        product=product,
-        product_version=version,
+        generated_by=delivered,
+        product=product if delivered == "agent" else None,
+        product_version=version if delivered == "agent" else None,
     )