add support for group topics tg notifications

api/notifications.py

@@ -8,6 +8,8 @@ api_url = str(config("SMS_API_URL", cast=str, default=""))
 api_key = str(config("SMS_API_KEY", cast=str, default=""))
 bot_token = str(config("TG_BOT_TOKEN", cast=str, default=""))
 chat_id = str(config("TG_CHAT_ID", cast=str, default=""))
+# Optional forum topic to post into. If empty, messages go to the group's General topic.
+topic_id = str(config("TG_TOPIC_ID", cast=str, default=""))
 
 
 def format_mobile(mobile: str) -> str:
@@ -88,6 +90,8 @@ def send_telegram_markdown(message: str):
     try:
         url = f"https://api.telegram.org/bot{bot_token}/sendMessage"
         payload = {"chat_id": chat_id, "text": message, "parse_mode": "MarkdownV2"}
+        if topic_id:
+            payload["message_thread_id"] = topic_id
 
         response = requests.post(url, data=payload)
         response.raise_for_status()