Add events for handled bugs

[joshuahannan]

Issue To Be Solved

There are many instances in the core contracts where we gracefully handle bugs by doing a no-op or something similar. It could be useful to add events for these so we can potentially detect when they happen and fix whatever is causing it.

Suggest A Solution

• Identify places in contracts like FlowTransactionScheduler where we gracefully handle bugs and add events for them
• Set up some way to monitor the events over time