When something causes an exception in `TaskRunner.markTaskAsRunning()` its execution fails, but this happens before we update the SO, which means that this failure does not count towards the `attempts` on the task. Task Manager will continue to try running this task for ever.
This PR increments the `attempts` when a failure occurs during `TaskRunner.markTaskAsRunning()` to ensure such a task doesn't continue to run to infinity.
Note that this fix will not affect `scheduled` tasks, as they are designed to _ignore_ their `attempts` and run for ever. In such a case this task will continue to consume Task Manager resources until canceled, but these failures will be logged and could be identified when needed.
c89f1f18d3