Make sure we have unique keys per queue for queue metadata

[adam-fowler]

Also rename queue keys to use dot notation eg queueName.pending, queueName.metadata.test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.73%. Comparing base (b646b55) to head (4d44117).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   89.59%   89.73%   +0.13%     
==========================================
  Files           3        3              
  Lines         221      224       +3     
==========================================
+ Hits          198      201       +3     
  Misses         23       23              

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[thoven87]

I believe some work is needed to be done in the job scheduler to allow multiple job scheduler per queue. I discovered while working on this PR it does not matter how many scheduler instances that's created, there will always be one scheduler metadata in the table. The first queue name will be picked up.