feat(metrics): distinguish received and acknowledged CDRs

tests/test_api_server.py

@@ -160,6 +160,7 @@ class TestIngestionAPIServer(unittest.IsolatedAsyncioTestCase):
         self.assertEqual(status, 200)
         content = body.decode("utf-8")
         self.assertIn("cdr_api_received_total", content)
+        self.assertIn("cdr_api_acknowledged_total", content)
 
     async def test_stats_endpoint(self):
         status, _, body = await self._http_request("GET", "/stats")
@@ -168,6 +169,26 @@ class TestIngestionAPIServer(unittest.IsolatedAsyncioTestCase):
         self.assertIn("pipeline", data)
         self.assertIn("breakdown", data)
         self.assertIn("total_received", data["pipeline"])
+        self.assertIn("total_acknowledged", data["pipeline"])
+
+    async def test_metrics_separated_counters(self):
+        from app.api.metrics import api_metrics
+        received_before = api_metrics.total_received
+        ack_before = api_metrics.total_acknowledged
+
+        # Send invalid payload (400 Bad Request)
+        status, _, _ = await self._http_request("POST", "/api/v1/cdr/raw", body=b"{}", headers={"Content-Type": "application/json"})
+        self.assertEqual(status, 400)
+        self.assertEqual(api_metrics.total_received, received_before + 1)
+        self.assertEqual(api_metrics.total_acknowledged, ack_before)
+
+        # Send valid payload (202 Accepted)
+        from tests.test_api_delivery import payload
+        valid_body = json.dumps(payload()).encode("utf-8")
+        status, _, _ = await self._http_request("POST", "/api/v1/cdr/raw", body=valid_body, headers={"Content-Type": "application/json"})
+        self.assertEqual(status, 202)
+        self.assertEqual(api_metrics.total_received, received_before + 2)
+        self.assertEqual(api_metrics.total_acknowledged, ack_before + 1)
 
     async def test_not_found_returns_404(self):
         status, _, body = await self._http_request("GET", "/unknown/route")