[backend] Fix on NPE in case of data being null

[Dimfacion]

Proposed changes

• Fix on NPE in case data we got back from tanium are empty

Related issues

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 32.42%. Comparing base (6e03516) to head (1487012).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #1859   +/-   ##
=========================================
  Coverage     32.42%   32.42%           
  Complexity     1623     1623           
=========================================
  Files           561      561           
  Lines         16834    16834           
  Branches        984      984           
=========================================
  Hits           5459     5459           
  Misses        11133    11133           
  Partials        242      242           

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