[flask, seer] autofixable flagship error - UnboundLocalError - OPTION 2 [chained]

[realkosty]

Implemented as chained exception (raise ... from ...). This way SEs are not confused and will see familiar-ish inventory error. Same can be done for Option 1 (#857)

This is designed not to break Critical Experiences (see validate_inventory)

This is mutually exclusive with Option 1 (#857) we have to pick one or the other depending on which one provides a better Seer demo.

Testing

standard_checkout_fail

http://localhost:3000/?cexp=standard_checkout_fail&se=unboundlocalerror2-cexp-standard_checkout_fail

flagship error, N+1 query

checkout_success

http://localhost:3000/?cexp=checkout_success&se=unboundlocalerror2-cexp-checkout_success

no errors, only N+1 query

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1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
empower	⬜️ Ignored (Inspect)			Jun 13, 2025 11:08pm

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.

Project coverage is 27.42%. Comparing base (d819193) to head (11a70f6).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
flask/src/main.py	0.00%	24 Missing ⚠️
flask/src/db.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #858      +/-   ##
==========================================
- Coverage   27.76%   27.42%   -0.34%     
==========================================
  Files          41       41              
  Lines        1059     1072      +13     
  Branches      115      115              
==========================================
  Hits          294      294              
- Misses        746      759      +13     
  Partials       19       19              

Flag	Coverage Δ
api	6.40% <0.00%> (-0.18%)	⬇️
frontend	44.72% <ø> (ø)

Components	Coverage Δ
checkout_module	6.40% <0.00%> (-0.18%)	⬇️
product_component	41.47% <ø> (ø)

Files with missing lines	Coverage Δ
flask/src/db.py	0.00% <0.00%> (ø)
flask/src/main.py	0.00% <0.00%> (ø)