Fix alarm status on Command PVs

[GDYendell]

Add ZNAM, ONAM and initial_value to underlying bool record

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.35%. Comparing base (a8f1cdb) to head (f75e039).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #265   +/-   ##
=======================================
  Coverage   89.35%   89.35%           
=======================================
  Files          45       45           
  Lines        2273     2273           
=======================================
  Hits         2031     2031           
  Misses        242      242           

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