Threat model check using Guardlink

[ashish-shroff-bugb]

This PR creates annotations using Guardlink - helpful while creating threat model. Threat model.md is attached as well with the report.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.00%. Comparing base (40808f1) to head (359781b).
⚠️ Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
...ility/sampleVulnerability/SampleVulnerability.java	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #509      +/-   ##
============================================
- Coverage     49.07%   49.00%   -0.07%     
  Complexity      346      346              
============================================
  Files            56       57       +1     
  Lines          2101     2104       +3     
  Branches        226      226              
============================================
  Hits           1031     1031              
- Misses          989      992       +3     
  Partials         81       81              

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[preetkaran20]

@ashish-shroff-bugb what is the purpose of this PR?