First draft of register tests

[pudelkoM]

Adds a simple read write test for the register in the int profile.

Also introduces the Stratum specific annotation for registers: @stratum("clear_interval_ms: 1")

TODO:

• Dataplane tests

[codecov]

Codecov Report

Merging #149 (e7540b7) into main (971bcb3) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #149   +/-   ##
=========================================
  Coverage     69.91%   69.91%           
  Complexity      223      223           
=========================================
  Files            17       17           
  Lines          1622     1622           
  Branches        133      133           
=========================================
  Hits           1134     1134           
  Misses          414      414           
  Partials         74       74           

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