SQL statement debug logging is incomplete

[iansltx]

💥  Actual behavior

Debug logging of SQL statements doesn't cover all statements.

🧑‍💻  Steps to reproduce

1. Run Fleet with FLEET_DEV_ENABLE_SQL_INTERCEPTOR=1
2. Run e.g. the hosts list endpoint
3. Notice that there are fewer database queries logged than you would expect

🕯️ More info

The interception code here is an undocumented WIP. It's just as well that it's undocumented at this point, but the feature is quite useful for tracing through endpoint executions for performance or correctness tracking, so ideally we just make it work with more/all of our MySQL calls