docs: add threat model document - #1328

 17 files  ±0   17 suites  ±0   19m 35s ⏱️ - 3m 25s
 33 tests ±0   33 ✅ ±0  0 💤 ±0  0 ❌ ±0 
141 runs  ±0  141 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit a9e71bc. ± Comparison against earlier commit 90fa142.