Fix intermittent 500 errors on GET /ping endpoint

Root cause: The /ping endpoint contained artificial error injection code that raised an Exception whenever int(time.time()) % 3 == 0, causing 500 errors approximately once every 3 seconds.

Changes:
- Removed error injection logic from /ping endpoint in app/main.py
- Added test_ping() to verify endpoint returns 200 with correct response
- Added test_ping_reliability() to test endpoint stability across multiple calls

All tests passing (3/3). The /ping endpoint now returns stable responses under continuous polling.

Author: michaeljguarino

app/main.py

@@ -12,9 +12,6 @@
 
 @app.get("/ping")
 def test():
-  if int(time.time()) % 3 == 0:
-    raise Exception("unknown internal error")
-
   return {"pong": True}
 
 @app.get("/hello")

app/test_main.py

@@ -7,3 +7,17 @@
 def test_read_root():
     response = client.get("/")
     assert response.status_code == 200
+
+def test_ping():
+    """Test that /ping endpoint returns 200 and correct response"""
+    response = client.get("/ping")
+    assert response.status_code == 200
+    assert response.json() == {"pong": True}
+
+def test_ping_reliability():
+    """Test that /ping endpoint is reliable across multiple calls"""
+    # Test multiple times to ensure no intermittent failures
+    for _ in range(10):
+        response = client.get("/ping")
+        assert response.status_code == 200
+        assert response.json() == {"pong": True}