(fix) don't block proxy startup if license check fails & using prometheus (#6839)

* fix - don't block proxy startup if not a premium user

* test_litellm_proxy_server_config_with_prometheus

* add test for proxy startup

* fix remove unused test

* fix startup test

* add comment on bad-license

tests/basic_proxy_startup_tests/test_basic_proxy_startup.py

@@ -0,0 +1,51 @@
+"""
+This test ensures that the proxy starts and serves requests even with a bad license.
+
+
+in ci/cd config.yml, we set the license to "bad-license"
+"""
+
+import pytest
+import aiohttp
+from typing import Optional
+
+
+@pytest.mark.asyncio
+async def test_health_and_chat_completion():
+    """
+    Test health endpoints and chat completion:
+    1. Check /health/readiness
+    2. Check /health/liveness
+    3. Make a chat completion call
+    """
+    async with aiohttp.ClientSession() as session:
+        # Test readiness endpoint
+        async with session.get("http://0.0.0.0:4000/health/readiness") as response:
+            assert response.status == 200
+            readiness_response = await response.json()
+            assert readiness_response["status"] == "connected"
+
+        # Test liveness endpoint
+        async with session.get("http://0.0.0.0:4000/health/liveness") as response:
+            assert response.status == 200
+            liveness_response = await response.json()
+            print("liveness_response", liveness_response)
+
+        # Make a chat completion call
+        url = "http://0.0.0.0:4000/chat/completions"
+        headers = {
+            "Authorization": "Bearer sk-1234",
+            "Content-Type": "application/json",
+        }
+        data = {
+            "model": "gpt-4",
+            "messages": [
+                {"role": "system", "content": "You are a helpful assistant."},
+                {"role": "user", "content": "Hello!"},
+            ],
+        }
+
+        async with session.post(url, headers=headers, json=data) as response:
+            assert response.status == 200
+            completion_response = await response.json()
+            assert "choices" in completion_response