bugfix: querybuilder logger

[robacarp]

The querybuilder as is doesn't work and isn't usable because the logger call isn't working, resulting in this error message:

in lib/granite/src/granite/query/executors/base.cr:8: undefined constant Granite::Logger

      Granite::Logger.log messages
      ^~~~~~~~~~~~~~~

This corrects the showstopping bug, and lets this appear in the logs instead:

The log formatting still needs a bit of work, but at least it compiles

🍌