tests: new regression test for lp-2161982

[sergiocazzolato]

This is a new test for lp-2161982 , also it is included a minor fix in sru-validation-check for reexecution debug output.

Those changes are required for sru validation.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.14%. Comparing base (ba2436a) to head (5f9d0fc).
⚠️ Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #17828      +/-   ##
==========================================
+ Coverage   82.06%   82.14%   +0.08%     
==========================================
  Files        1420     1420              
  Lines      201401   201938     +537     
  Branches     2503     2626     +123     
==========================================
+ Hits       165279   165892     +613     
- Misses      33914    34000      +86     
+ Partials     2208     2046     -162     

Flag	Coverage Δ
unittests	82.14% <ø> (+0.08%)	⬆️

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[github-actions]

Tue Oct 13 19:32:50 UTC 2026
The following results are from: https://github.com/canonical/snapd/actions/runs/38400524870

[ernestl]

Thanks