feat: add log-level=debug

[steve-chavez]

Problem

On #3213, the following log lines were added:

22/Apr/2024:16:16:20 -0500: Schema cache queried in 16.3 milliseconds
22/Apr/2024:16:16:20 -0500: Schema cache loaded 264 Relations, 221 Relationships, 142 Functions, 15 Domain Representations, 45 Media Type Handlers
22/Apr/2024:16:16:20 -0500: Schema cache loaded in 16.7 milliseconds

But the Schema cache loaded in 16.7 milliseconds line is really for debugging, the user cannot take any action for reducing that time.

Solution

Only log the above line when log-level=debug.