fix: expand bgp pipeline and stabilize backend tests

backend/tests/test_api.py

@@ -8,6 +8,8 @@ from httpx import AsyncClient, ASGITransport
 from app.main import app
 from app.core.config import settings
 from app.core.security import create_access_token
+from app.db.session import get_db
+from app.models.user import User
 
 
 @pytest.fixture
@@ -90,10 +92,58 @@ async def test_alerts_without_auth():
 @pytest.mark.asyncio
 async def test_alerts_endpoint_with_auth(auth_headers):
     """Test alerts endpoint with authentication"""
+    class _ScalarResult:
+        def __init__(self, rows=None, scalar_value=0):
+            self._rows = rows or []
+            self._scalar_value = scalar_value
+
+        def scalars(self):
+            class _Scalars:
+                def __init__(self, rows):
+                    self._rows = rows
+
+                def all(self):
+                    return self._rows
+
+            return _Scalars(self._rows)
+
+        def scalar(self):
+            return self._scalar_value
+
+    class _FakeAlertsSession:
+        def __init__(self):
+            self.calls = 0
+
+        async def execute(self, _query):
+            self.calls += 1
+            if self.calls == 1:
+                return _ScalarResult(rows=[])
+            return _ScalarResult(rows=[], scalar_value=0)
+
+    def override_get_current_user():
+        return User(
+            id=1,
+            username="testuser",
+            email="test@example.com",
+            password_hash="hashed",
+            role="admin",
+            is_active=True,
+        )
+
+    async def override_get_db():
+        yield _FakeAlertsSession()
+
+    app.dependency_overrides = {
+        __import__("app.core.security", fromlist=["get_current_user"]).get_current_user: override_get_current_user,
+        get_db: override_get_db,
+    }
     transport = ASGITransport(app=app)
-    async with AsyncClient(transport=transport, base_url="http://test") as client:
-        response = await client.get("/api/v1/alerts", headers=auth_headers)
-        assert response.status_code == 200
+    try:
+        async with AsyncClient(transport=transport, base_url="http://test") as client:
+            response = await client.get("/api/v1/alerts", headers=auth_headers)
+            assert response.status_code == 200
+    finally:
+        app.dependency_overrides.clear()
 
 
 @pytest.mark.asyncio