update sign up notifications

api/bot.py

@@ -70,6 +70,26 @@ async def send_telegram_alert(markdown_message: str):
     )
 
 
+async def send_telegram_photo(photo, markdown_caption: str):
+    """Send a photo. `photo` may be raw bytes / a file-like object (uploaded
+    directly to Telegram) or a public URL string."""
+    logger.info("[TELEGRAM] Preparing to send photo...")
+    kwargs = {}
+    if TOPIC_ID:
+        kwargs["message_thread_id"] = int(TOPIC_ID)
+    await bot.send_photo(
+        chat_id=str(CHAT_ID),
+        photo=photo,
+        caption=markdown_caption,
+        parse_mode=ParseMode.MARKDOWN_V2,
+        # Uploading media is slower than a text send; the defaults (5s) time out.
+        connect_timeout=15,
+        read_timeout=30,
+        write_timeout=60,
+        **kwargs,
+    )
+
+
 def escape_markdown_v2(text: str) -> str:
     escape_chars = r"_~`>#+-=|{}.!\\"
     return re.sub(f"([{re.escape(escape_chars)}])", r"\\\1", text)