Add monitoring PF service

app/services/notifier.py

@@ -0,0 +1,48 @@
+"""Telegram notification sender. Uses httpx directly — no bot framework needed
+for outbound messages, so we can call it from the scheduler thread without
+needing an event loop."""
+
+from __future__ import annotations
+
+import logging
+
+import httpx
+
+from app.config import settings
+
+logger = logging.getLogger(__name__)
+
+TG_API = "https://api.telegram.org"
+
+
+def send_message(chat_id: str, text: str, parse_mode: str = "HTML") -> bool:
+    if not settings.tg_bot_token:
+        logger.warning("TG_BOT_TOKEN not set — skipping notification to %s", chat_id)
+        return False
+    if not chat_id:
+        logger.warning("Empty chat_id — skipping notification")
+        return False
+    url = f"{TG_API}/bot{settings.tg_bot_token}/sendMessage"
+    try:
+        with httpx.Client(timeout=15.0) as client:
+            r = client.post(
+                url,
+                json={
+                    "chat_id": chat_id,
+                    "text": text,
+                    "parse_mode": parse_mode,
+                    "disable_web_page_preview": False,
+                },
+            )
+        if r.status_code != 200:
+            logger.error("TG send failed: %s %s", r.status_code, r.text)
+            return False
+        return True
+    except httpx.HTTPError as e:
+        logger.error("TG send exception: %s", e)
+        return False
+
+
+def notify_admin(text: str) -> None:
+    if settings.admin_chat_id:
+        send_message(settings.admin_chat_id, text)