When configuring recurring jobs I've noticed that SolidQueue is hiding configuration mistakes that make it difficult to catch potential errors:

1. Jobs that don't pass SolidQueue::RecurringTask's validation are silently filtered out without any error
2. Setting SOLID_QUEUE_RECURRING_SCHEDULE to a path that doesn't exist makes SolidQueue silently fall back to an empty schedule

Expected behaviour: above errors should trigger an exception.