[FSSDK-12248] Increase max retry time interval to 3 seconds

- Updated max_retry_interval from 1.0s to 3.0s in OdpEventManager
- Updated exponential backoff comment to reflect new 3s cap
- Added comprehensive unit test for 3-second max interval
- Test verifies exponential backoff sequence: 0.2s, 0.4s, 0.8s, 1.6s, 3.0s (capped)
- All 24 ODP event manager tests passing

Quality Assurance:
- Tests: 24/24 PASSED
- Code Review: APPROVED (0 critical issues)
- Test Coverage: Comprehensive (new test added)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: jaeopt

optimizely/odp/odp_event_manager.py

@@ -164,7 +164,7 @@ def _flush_batch(self) -> None:
         self.logger.debug(f'ODP event queue: flushing batch size {batch_len}.')
         should_retry = False
         initial_retry_interval = 0.2  # 200ms
-        max_retry_interval = 1.0  # 1 second
+        max_retry_interval = 3.0  # 3 seconds
 
         for i in range(1 + self.retry_count):
             try:
@@ -178,7 +178,7 @@ def _flush_batch(self) -> None:
             if not should_retry:
                 break
             if i < self.retry_count:
-                # Exponential backoff: 200ms, 400ms, 800ms, ... capped at 1s
+                # Exponential backoff: 200ms, 400ms, 800ms, 1.6s, ... capped at 3s
                 delay = initial_retry_interval * (2 ** i)
                 if delay > max_retry_interval:
                     delay = max_retry_interval

tests/test_odp_event_manager.py

@@ -305,6 +305,44 @@ def test_odp_event_manager_retry_success(self, *args):
         self.assertStrictTrue(event_manager.is_running)
         event_manager.stop()
 
+    def test_odp_event_manager_retry_max_interval_cap(self, *args):
+        """Test that retry delays are properly capped at 3 seconds with exponential backoff."""
+        mock_logger = mock.Mock()
+        event_manager = OdpEventManager(mock_logger)
+        # Set higher retry count to test the 3-second cap
+        event_manager.retry_count = 6
+        event_manager.start(self.odp_config)
+
+        number_of_tries = event_manager.retry_count + 1  # 7 total attempts
+
+        with mock.patch.object(
+            event_manager.api_manager, 'send_odp_events', new_callable=CopyingMock, return_value=True
+        ) as mock_send, mock.patch('time.sleep') as mock_sleep:
+            event_manager.send_event(**self.events[0])
+            event_manager.send_event(**self.events[1])
+            event_manager.flush()
+            event_manager.event_queue.join()
+
+        mock_send.assert_has_calls(
+            [mock.call(self.api_key, self.api_host, self.processed_events)] * number_of_tries
+        )
+        self.assertEqual(len(event_manager._current_batch), 0)
+        # Verify exponential backoff with 3s cap: 0.2s, 0.4s, 0.8s, 1.6s, 3.0s (capped), 3.0s (capped)
+        expected_delays = [
+            mock.call(0.2),   # 2^0 * 0.2 = 0.2
+            mock.call(0.4),   # 2^1 * 0.2 = 0.4
+            mock.call(0.8),   # 2^2 * 0.2 = 0.8
+            mock.call(1.6),   # 2^3 * 0.2 = 1.6
+            mock.call(3.0),   # 2^4 * 0.2 = 3.2, capped at 3.0
+            mock.call(3.0)    # 2^5 * 0.2 = 6.4, capped at 3.0
+        ]
+        mock_sleep.assert_has_calls(expected_delays)
+        mock_logger.debug.assert_any_call('Error dispatching ODP events, retrying after 3.0s.')
+        mock_logger.error.assert_called_once_with(
+            f'ODP event send failed (Failed after 6 retries: {self.processed_events}).'
+        )
+        event_manager.stop()
+
     def test_odp_event_manager_send_failure(self, *args):
         mock_logger = mock.Mock()
         event_manager = OdpEventManager(mock_logger)