fix(reprovision): host changes on secrets don't change their hash

[neurolabs]

Changing hosts on secrets did not trigger reprovisioning of the VM.

Now, all fields of the SecretEntry are fed into the hash.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.93%. Comparing base (05ea48e) to head (25f97a7).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #10      +/-   ##
==========================================
+ Coverage   87.90%   87.93%   +0.02%     
==========================================
  Files          86       86              
  Lines        5135     5147      +12     
==========================================
+ Hits         4514     4526      +12     
  Misses        432      432              
  Partials      189      189              

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