feat: Telegram settings in DB with UI edit and test send

Store notification_channels (migration 004), effective config DB over env,
PUT/test API endpoints, Settings form, and pass db session into ingest notify.

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

backend/tests/test_telegram_notify.py

@@ -3,24 +3,27 @@
 from datetime import datetime, timezone
 from unittest.mock import patch
 
-import pytest
-
-from app.models import Event, Host, Problem
+from app.models import Event, Problem
 from app.services import telegram_notify
+from app.services.notification_settings import TelegramConfig
 
 
-def test_notify_event_respects_min_severity(monkeypatch):
+def _telegram_cfg(*, min_severity: str) -> TelegramConfig:
+    return TelegramConfig(
+        enabled=True,
+        bot_token="test-token",
+        chat_id="123",
+        min_severity=min_severity,
+        source="env",
+    )
+
+
+def test_notify_event_respects_min_severity():
     sent: list[str] = []
 
-    def fake_send(message: str) -> None:
+    def fake_send(message: str, **kwargs) -> None:
         sent.append(message)
 
-    monkeypatch.setenv("TELEGRAM_ENABLED", "true")
-    monkeypatch.setenv("TELEGRAM_BOT_TOKEN", "test-token")
-    monkeypatch.setenv("TELEGRAM_CHAT_ID", "123")
-    monkeypatch.setenv("TELEGRAM_MIN_SEVERITY", "warning")
-    telegram_notify.get_settings.cache_clear()
-
     event = Event(
         event_id="00000000-0000-4000-8000-000000000001",
         host_id=1,
@@ -33,28 +36,25 @@ def test_notify_event_respects_min_severity(monkeypatch):
         payload={},
     )
 
-    with patch.object(telegram_notify, "_send_text", side_effect=fake_send):
-        telegram_notify.notify_event(event)
+    cfg = _telegram_cfg(min_severity="warning")
+    with patch.object(telegram_notify, "get_effective_telegram_config", return_value=cfg):
+        with patch.object(telegram_notify, "send_telegram_text", side_effect=fake_send):
+            telegram_notify.notify_event(event)
     assert sent == []
 
     event.severity = "warning"
-    with patch.object(telegram_notify, "_send_text", side_effect=fake_send):
-        telegram_notify.notify_event(event)
+    with patch.object(telegram_notify, "get_effective_telegram_config", return_value=cfg):
+        with patch.object(telegram_notify, "send_telegram_text", side_effect=fake_send):
+            telegram_notify.notify_event(event)
     assert len(sent) == 1
 
 
-def test_notify_problem_respects_min_severity(monkeypatch):
+def test_notify_problem_respects_min_severity():
     sent: list[str] = []
 
-    def fake_send(message: str) -> None:
+    def fake_send(message: str, **kwargs) -> None:
         sent.append(message)
 
-    monkeypatch.setenv("TELEGRAM_ENABLED", "true")
-    monkeypatch.setenv("TELEGRAM_BOT_TOKEN", "test-token")
-    monkeypatch.setenv("TELEGRAM_CHAT_ID", "123")
-    monkeypatch.setenv("TELEGRAM_MIN_SEVERITY", "high")
-    telegram_notify.get_settings.cache_clear()
-
     problem = Problem(
         title="brute",
         summary="burst",
@@ -63,11 +63,14 @@ def test_notify_problem_respects_min_severity(monkeypatch):
         fingerprint="fp1",
     )
 
-    with patch.object(telegram_notify, "_send_text", side_effect=fake_send):
-        telegram_notify.notify_problem(problem)
+    cfg = _telegram_cfg(min_severity="high")
+    with patch.object(telegram_notify, "get_effective_telegram_config", return_value=cfg):
+        with patch.object(telegram_notify, "send_telegram_text", side_effect=fake_send):
+            telegram_notify.notify_problem(problem)
     assert sent == []
 
     problem.severity = "high"
-    with patch.object(telegram_notify, "_send_text", side_effect=fake_send):
-        telegram_notify.notify_problem(problem)
+    with patch.object(telegram_notify, "get_effective_telegram_config", return_value=cfg):
+        with patch.object(telegram_notify, "send_telegram_text", side_effect=fake_send):
+            telegram_notify.notify_problem(problem)
     assert len(sent) == 1